{"id":5059,"date":"2014-12-08T15:30:14","date_gmt":"2014-12-08T20:30:14","guid":{"rendered":"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/?page_id=5059"},"modified":"2026-07-20T17:06:30","modified_gmt":"2026-07-20T21:06:30","slug":"hornets-wasps-and-yellowjackets","status":"publish","type":"page","link":"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/fact-sheets\/common-name-listing\/hornets-wasps-and-yellowjackets\/","title":{"rendered":"Hornets, Wasps and Yellowjackets"},"content":{"rendered":"<figure id=\"13177\" class=\"wp-caption alignright\"><a href=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-13177\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c-300x230.jpg\" alt=\"an American Yellowjacket, also called Alaska Yellowjacket (Vespula alascensis)\" width=\"300\" height=\"230\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c-300x230.jpg 300w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c-768x588.jpg 768w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c-105x80.jpg 105w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c-317x243.jpg 317w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c-423x324.jpg 423w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c-634x485.jpg 634w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c-846x648.jpg 846w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323c.jpg 883w\" sizes=\"auto, (max-width: 320px) 85vw, (max-width: 768px) 67vw, (max-width: 1024px) 62vw,300px\" \/><\/a><figcaption class=\"wp-caption-text\">American Yellowjacket \/ Alaska Yellowjacket (<i>Vespula alascensis<\/i>) (female worker) (Searsport, ME; 7\/23\/2023)<\/figcaption><\/figure>\n<p>Many of Maine&#8217;s hornets, wasps and yellowjackets are members of the Vespidae family of insects. <em>Most<\/em> vespid wasps are social insects and most are capable of repeatedly stinging if they feel threatened or feel their nest is in danger. They can be a significant nuisance throughout Maine, particularly in mid to late summer when colonies reach peak numbers. The colony (nest) is started each spring by a single fertilized queen and continues to grow through the summer as more workers hatch.\u00a0 Hornets, wasps and yellowjackets may be aerial or ground nest builders, producing grayish paper nests in trees, shrubs, and under building eaves. They may also nest in the ground, in logs, or in the walls of structures. They prey on caterpillars and other insects, though yellowjackets will also scavenge and are often attracted to sugary and high-protein foods in garbage containers.<\/p>\n<h2>Family Vespidae (most are social and stinging):<\/h2>\n<ul>\n<li><strong><a href=\"https:\/\/entomology.ca.uky.edu\/ef600\" target=\"_blank\" rel=\"noopener noreferrer\"><b>European hornets<\/b><\/a> <\/strong>(University of Kentucky)<\/li>\n<li><strong><b>Paper Wasps<\/b><\/strong>\n<ul>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/11641\" target=\"_blank\" rel=\"noopener\"><strong>Guinea Paper Wasp<\/strong><\/a> (BugGuide.net)<\/li>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/14227\" target=\"_blank\" rel=\"noopener\"><strong>Northern Paper Wasp \/ Dark Paper Wasp<\/strong><\/a> &#8211; <em>Polistes fuscatus<\/em> (BugGuide.net) (also known as the Golden Paper Wasp, but not to be confused with the western species, <em>Polistes aurifer<\/em>, which is also called the Golden Paper Wasp)<\/li>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/24972\" target=\"_blank\" rel=\"noopener\"><strong>Golden Paper Wasp<\/strong><\/a> &#8211; <em>Polistes aurifer<\/em> (<strong>western species<\/strong>) (BugGuide.net)<\/li>\n<\/ul>\n<\/li>\n<li><strong>Potter and Mason Wasps<\/strong> (Solitary wasps that are capable of stinging but they are rarely aggressive) (Subfamily <span class=\"bgpage-taxon-desc\">Eumeninae<\/span>): Genus <a href=\"https:\/\/bugguide.net\/node\/view\/6812\" target=\"_blank\" rel=\"noopener noreferrer\"><em><strong>Ancistrocerus<\/strong><\/em><\/a> (BugGuide.net)<\/li>\n<li><strong>Yellowjackets<\/strong> are small, typically yellow and black wasps, approximately 1\/2-3\/4 of an inch in length. They tend to be more aggressive than other wasps, will defend their colony vigorously, and can sting repeatedly. Yellowjacket species within the <em>Vespula <\/em>genus are referred to as &#8220;ground yellowjackets.&#8221;\n<ul>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/14087\" target=\"_blank\" rel=\"noopener\"><strong>American \/ Alaska Yellowjackets<\/strong><\/a> &#8211; <i>Vespula alascensis <\/i>(generally nest in the ground but not always) (BugGuide.net)<\/li>\n<li><strong><a href=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/common-name-listing\/bald-faced-hornet\/\"><b>Bald-faced hornets \/ Blackjackets<\/b><\/a><\/strong> &#8211; <em>Dolichovespula maculata<\/em> (these are technically a type of yellowjacket and are not a &#8216;true&#8217; hornet). They have black and white patterning (no yellow at all) and range from 5\/8-3\/4 of an inch in length. They, too, are aggressive and may attack with little provocation.<\/li>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/12983\" target=\"_blank\" rel=\"noopener\"><strong>Common Aerial Yellowjackets<\/strong><\/a> &#8211; <i>Dolichovespula arenaria <\/i>(BugGuide.net) (they make mostly aerial nests but sometimes they&#8217;ll nest under rocks or in the ground)<\/li>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/14081\" target=\"_blank\" rel=\"noopener\"><strong>Downy Yellowjacket<\/strong><\/a> &#8211; <i>Vespula flavopilosa <\/i>(BugGuide.net) (thick yellow hairs on the thorax and abdomen)<\/li>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/11564\" target=\"_blank\" rel=\"noopener\"><strong>Eastern Yellowjackets<\/strong><\/a> &#8211; <i>Vespula maculifrons <\/i>(BugGuide.net)<\/li>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/14079\" target=\"_blank\" rel=\"noopener\"><strong>Forest Yellowjackets<\/strong><\/a> &#8211; <i>Vespula acadica <\/i>(BugGuide.net)<\/li>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/14083\" target=\"_blank\" rel=\"noopener\"><strong>German Yellowjackets<\/strong><\/a> &#8211; <i>Vespula germanica <\/i>(BugGuide.net)<\/li>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/14086\" target=\"_blank\" rel=\"noopener\"><strong>Widow Yellowjackets \/ Northeastern Yellowjackets<\/strong><\/a> &#8211; <em>Vespula vidua<\/em> (BugGuide.net)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Examples of other Families of Wasps (mostly solitary and non-stinging):<\/h2>\n<ul>\n<li><strong>Family Crabronidae<\/strong> (Square-headed Wasps, <a href=\"https:\/\/nature.mdc.mo.gov\/discover-nature\/field-guide\/sand-wasps\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Sand Wasps<\/strong><\/a>, and Allies)\n<ul>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/41984\" target=\"_blank\" rel=\"noopener\"><em><strong>Bicyrtes ventralis<\/strong><\/em><\/a> (BugGuide.net)<\/li>\n<li><a href=\"https:\/\/mdc.mo.gov\/discover-nature\/field-guide\/eastern-cicada-killer\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Eastern Cicada-killer Wasp<\/strong><\/a> (<em>Sphecius speciosus<\/em>) (solitary) (Missouri Dept. of Conservation) <em><strong>See also:<\/strong><\/em> <a href=\"https:\/\/bugguide.net\/node\/view\/514\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Eastern Cicada-killer Wasp<\/strong><\/a> (BugGuide.net)<\/li>\n<\/ul>\n<\/li>\n<li><strong>Family Ichneumonidae <\/strong>(Ichneumonid wasps; members are solitary and non-stinging)\n<ul>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/1984740\" target=\"_blank\" rel=\"noopener\"><strong><i>Therion circumflexum<\/i><\/strong><\/a><i> <\/i>(BugGuide.net)<\/li>\n<\/ul>\n<\/li>\n<li><strong>Family Sphecidae <\/strong>(Thread-waisted wasps; most of its members are solitary):\n<ul>\n<li><a href=\"https:\/\/bugguide.net\/node\/view\/455\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Gold-marked Thread-waisted Wasp<\/strong><\/a> (solitary) (BugGuide.net)<\/li>\n<li><a href=\"https:\/\/insectlab.russell.wisc.edu\/2020\/08\/17\/great-golden-digger-wasp-another-asian-giant-hornet-look-alike\/\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Great Golden Digger Wasp<\/strong><\/a> (solitary) (Univ. of Wisconsin)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 16%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-5059 gallery-columns-6 gallery-size-thumbnail'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/Baldfaced-Hornets-001.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/Baldfaced-Hornets-001-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Bald-faced hornets guarding the entrance of their paper nest\" aria-describedby=\"gallery-1-650\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/Baldfaced-Hornets-001-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/Baldfaced-Hornets-001-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-650'>\n\t\t\t\tBald-faced Hornets (guarding their nest)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2019\/03\/Bald-facedHornet-02-e1594053373912.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2019\/03\/Bald-facedHornet-02-e1594053373912-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"A bald-faced hornet holding the remnants of an insect which was probably preyed upon by the hornet\" aria-describedby=\"gallery-1-7986\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2019\/03\/Bald-facedHornet-02-e1594053373912-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2019\/03\/Bald-facedHornet-02-e1594053373912-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-7986'>\n\t\t\t\tBald-faced Hornets\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2021\/04\/Gold-markedThread-Waisted-Wasp-Rockport-083020.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"136\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2021\/04\/Gold-markedThread-Waisted-Wasp-Rockport-083020-e1649875835518-150x136.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"a Gold-marked Thread-waisted Wasp in Rockport, Maine - August 30th, 2020\" aria-describedby=\"gallery-1-11493\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-11493'>\n\t\t\t\tGold-marked Thread-waisted Wasp (<i>Eremnophila aureonotata<\/i>) (Rockport, ME; 8\/30\/2020)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/PaperWasps.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/PaperWasps-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Guinea Paper Wasps (Polistes exclamans) resting on their nest and guarding it\" aria-describedby=\"gallery-1-452\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/PaperWasps-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/PaperWasps-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-452'>\n\t\t\t\tGuinea Paper Wasps (<i>Polistes exclamans<\/i>)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"a Northern Paper Wasp (Polistes fuscatus) (Orono, ME; 9\/14\/2025) (Photo courtesy of Edward S. Grew)\" aria-describedby=\"gallery-1-15827\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-300x300.jpg 300w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-768x766.jpg 768w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-105x105.jpg 105w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-317x316.jpg 317w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-423x422.jpg 423w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-634x632.jpg 634w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-846x843.jpg 846w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-951x948.jpg 951w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-400x400.jpg 400w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-600x600.jpg 600w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew-32x32.jpg 32w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Northern-Paper-Wasp-Polistes-fuscatus-091425-EGrew.jpg 988w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-15827'>\n\t\t\t\tNorthern Paper Wasp (<i>Polistes fuscatus<\/i>) (Orono, ME; 9\/14\/2025) (Photo courtesy of Edward S. Grew)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/GoldenPaperWasp.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/GoldenPaperWasp-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"a Northern Paper Wasp (known also by three other common names: Dark Paper Wasp, Golden Paper Wasp and the Common Paper Wasp)\" aria-describedby=\"gallery-1-450\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/GoldenPaperWasp-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/GoldenPaperWasp-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-450'>\n\t\t\t\tNorthern Paper Wasp (<i>Polistes fuscatus<\/i>) (known also by three other common names: Dark Paper Wasp, Golden Paper Wasp and the Common Paper Wasp)\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2022\/07\/Eastern-Cicada-Killer-PTracy-071122a.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2022\/07\/Eastern-Cicada-Killer-PTracy-071122a-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"An Eastern Cicada-killer Wasp resting on a deck\" aria-describedby=\"gallery-1-12423\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2022\/07\/Eastern-Cicada-Killer-PTracy-071122a-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2022\/07\/Eastern-Cicada-Killer-PTracy-071122a-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-12423'>\n\t\t\t\tEastern Cicada-killer Wasp (<i>Sphecius speciosus<\/i>) (~1.5&#8243; long; solitary and non-aggressive) (they provision their underground rearing chambers with paralyzed cicadas as food for their offspring) (Raymond Cape, ME; 7\/11\/2022) (Photo courtesy of Paul Tracy)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2022\/07\/Eastern-Cicada-Killer-PTracy-071122b.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2022\/07\/Eastern-Cicada-Killer-PTracy-071122b-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"An Eastern Cicada-killer Wasp inside a glass jar\" aria-describedby=\"gallery-1-12424\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2022\/07\/Eastern-Cicada-Killer-PTracy-071122b-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2022\/07\/Eastern-Cicada-Killer-PTracy-071122b-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-12424'>\n\t\t\t\tEastern Cicada-killer Wasp (<i>Sphecius speciosus<\/i>) (~1.5&#8243; long; solitary and non-aggressive) (often mistaken for a Murder Hornet due to its size) (Raymond Cape, ME; 7\/11\/2022) (Photo courtesy of Paul Tracy)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2021\/08\/Eastern-Cicada-Killer-083021.jpeg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"136\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2021\/08\/Eastern-Cicada-Killer-083021-e1647632716290-150x136.jpeg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"An Eastern Cicada-killer wasp\" aria-describedby=\"gallery-1-11833\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-11833'>\n\t\t\t\tEastern Cicada-killer Wasp (<i>Sphecius speciosus<\/i>) (Photo courtesy of Scott Saunders) (8\/29\/2021; Hollis, Maine)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/EuropeanHornet-01.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/EuropeanHornet-01-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"European Hornet\" aria-describedby=\"gallery-1-673\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/EuropeanHornet-01-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/EuropeanHornet-01-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-673'>\n\t\t\t\tEuropean Hornet\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2021\/08\/Great-Golden-Digger-Wasp-JMorton-081921.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2021\/08\/Great-Golden-Digger-Wasp-JMorton-081921-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"A Great Golden Digger Wasp, Sphex ichneumoneus, captured in Detroit, Maine - August 19th, 2021\" aria-describedby=\"gallery-1-11826\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2021\/08\/Great-Golden-Digger-Wasp-JMorton-081921-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2021\/08\/Great-Golden-Digger-Wasp-JMorton-081921-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-11826'>\n\t\t\t\tGreat Golden Digger Wasp (<i>Sphex ichneumoneus<\/i>) (solitary; females provision their rearing chambers or cells with katydids, one per cell with one egg deposited on each one) (Photo courtesy of Jennifer Morton; Detroit, Maine; 8\/19\/2021)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2024\/05\/Therion-circumflexon.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2024\/05\/Therion-circumflexon-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"A species of Ichneumonidae wasp (Therion circumflexon) (North Anson, ME; 5\/23\/2024) (Photo courtesy of Carol Lehto)\" aria-describedby=\"gallery-1-13604\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2024\/05\/Therion-circumflexon-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2024\/05\/Therion-circumflexon-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-13604'>\n\t\t\t\tA species of Ichneumonidae wasp (<i>Therion circumflexon<\/i>) (North Anson, ME; 5\/23\/2024) (Photo courtesy of Carol Lehto) \n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/03\/Potter-Wasp-possibly-Ancistrocerus-gazella.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"147\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/03\/Potter-Wasp-possibly-Ancistrocerus-gazella-e1679344791630-150x147.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Example of a female Potter wasp (likely Ancistrocerus gazella) situated at the entrance of her nest\" aria-describedby=\"gallery-1-12876\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-12876'>\n\t\t\t\tExample of a Potter wasp (likely <i><a href=\"https:\/\/cjai.biologicalsurvey.ca\/bmc_05\/07a_gazella.html\" target=\"blank\" rel=\"noopener noreferrer\">Ancistrocerus gazella<\/a><\/i>) (the female collects as many as twenty caterpillars to provision each nest which she later seals with mud)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/VespidWasp.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2010\/10\/VespidWasp-e1647631962679-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"Catskill Potter Wasp (Ancistrocerus catskill) on a daisy fleabane flower (Troy, ME; 6\/17\/2008) (This wasp is a solitary species of Vespid wasp in the group known as Potter and Mason wasps.)\" aria-describedby=\"gallery-1-456\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-456'>\n\t\t\t\tCatskill Potter Wasp (<i>Ancistrocerus catskill<\/i>) (Troy, ME; 6\/17\/2008) (This wasp is a solitary species of Vespid wasp in the group known as Potter and Mason wasps.)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2020\/12\/Sand-Wasp-Genus-Bicyrtes-072909.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2020\/12\/Sand-Wasp-Genus-Bicyrtes-072909-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"A Sand wasp (Bicyrtes ventralis) resting on a Black-eyed Susan flower in Troy, Maine - July 29th, 2009. Sand wasps are solitary, non-aggressive and beneficial.\" aria-describedby=\"gallery-1-10951\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2020\/12\/Sand-Wasp-Genus-Bicyrtes-072909-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2020\/12\/Sand-Wasp-Genus-Bicyrtes-072909-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-10951'>\n\t\t\t\tA sand wasp (<i>Bicyrtes ventralis)<\/i> (Troy, Maine; 7\/29\/2009) Sand wasps are solitary, non-aggressive and beneficial.\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323a.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"138\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323a-e1690921771148-150x138.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"an American Yellowjacket, also called Alaska Yellowjacket (Vespula alascensis)\" aria-describedby=\"gallery-1-13174\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-13174'>\n\t\t\t\tAmerican Yellowjacket \/ Alaska Yellowjacket (<i>Vespula alascensis<\/i>) (female worker) (Searsport, ME; 7\/23\/2023)\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323b.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323b-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"an American Yellowjacket worker with her wings removed in order to see more of the unique abdominal patterning\" aria-describedby=\"gallery-1-13175\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323b-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2023\/08\/Vespula-alascensis-American-Yellowjacket-072323b-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-13175'>\n\t\t\t\tAmerican Yellowjacket worker with her wings removed in order to see more of the unique abdominal patterning\n\t\t\t\t<\/dd><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon portrait'>\n\t\t\t\t<a href='https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Downy-Yellowjacket-Vespula-flavopilosa-091225-EGrew.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Downy-Yellowjacket-Vespula-flavopilosa-091225-EGrew-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"a Downy Yellowjacket (Vespula flavopilosa) (Orono, ME; 9\/12\/2025) (Photo courtesy of Edward S. Grew)\" aria-describedby=\"gallery-1-15839\" srcset=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Downy-Yellowjacket-Vespula-flavopilosa-091225-EGrew-150x150.jpg 150w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Downy-Yellowjacket-Vespula-flavopilosa-091225-EGrew-300x300.jpg 300w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Downy-Yellowjacket-Vespula-flavopilosa-091225-EGrew-400x400.jpg 400w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Downy-Yellowjacket-Vespula-flavopilosa-091225-EGrew-600x600.jpg 600w, https:\/\/extension.umaine.edu\/home-and-garden-ipm\/wp-content\/uploads\/sites\/43\/2025\/09\/Downy-Yellowjacket-Vespula-flavopilosa-091225-EGrew-32x32.jpg 32w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/dt>\n\t\t\t\t<dd class='wp-caption-text gallery-caption' id='gallery-1-15839'>\n\t\t\t\tDowny Yellowjacket (<i>Vespula flavopilosa<\/i>) (Orono, ME; 9\/12\/2025) (Photo courtesy of Edward S. Grew)\n\t\t\t\t<\/dd><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<hr \/>\n<h2>Management:<\/h2>\n<p>To reduce the risk of encountering yellowjackets and other stinging wasps, remove waste frequently and maintain tight lids on trash cans. If yellowjackets are present, avoid using perfumes and wearing bright colors, and keep food and drinks covered. Commercial traps can be effective for yellowjackets but are typically not attractive to bald-faced hornets or to paper wasps.\u00a0 Hornet, wasp and yellowjacket nests should not be disturbed unless they pose a risk. Nuisance nests are most easily removed in early spring before the colony has had a chance to grow. Larger, well-established nests may pose enough of a risk to warrant treatment. Nests should be treated at night when the wasps are least active. Insecticide treatments should be sprayed directly into the nest entrance, whether it is above or below ground. If the nest is located inside a wall, the entrance should be located and treated but not plugged to ensure that the insecticide is carried into the nest and to avoid insects showing up inside the structure. Stings can be painful and potentially life-threatening to those with allergies. Be sure to wear protective clothing when treating and removing nests.<\/p>\n<h3><strong><em>See also:<\/em><\/strong><\/h3>\n<ul>\n<li><a href=\"https:\/\/extension.psu.edu\/programs\/master-gardener\/counties\/monroe\/news\/wasps-beneficial-insects-and-pollinators\" target=\"_blank\" rel=\"noopener noreferrer\"><strong>Wasps and their role as a beneficial insect and pollinator<\/strong><\/a> (Wasps are beneficial in the environment) (Penn State Master Gardener Program)<\/li>\n<li><a href=\"https:\/\/entomology.ca.uky.edu\/ef620\" target=\"_blank\" rel=\"noopener noreferrer\"><b>Controlling Wasps, Hornets and Yellowjackets<\/b><\/a> (University of Kentucky)\u00a0(<a href=\"https:\/\/entomology.ca.uky.edu\/ef620esp\" target=\"_blank\" rel=\"noopener noreferrer\"><b>En espa\u00f1ol: El control de avispas, avispones y avispas<\/b><\/a>)<\/li>\n<\/ul>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>Many of Maine&#8217;s hornets, wasps and yellowjackets are members of the Vespidae family of insects. Most vespid wasps are social insects and most are capable of repeatedly stinging if they feel threatened or feel their nest is in danger. They can be a significant nuisance throughout Maine, particularly in mid to late summer when colonies [&hellip;]<\/p>\n","protected":false},"author":60,"featured_media":0,"parent":1561,"menu_order":21,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-5059","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Hornets, Wasps and Yellowjackets - Home and Garden IPM from Cooperative Extension - University of Maine Cooperative Extension<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/extension.umaine.edu\/home-and-garden-ipm\/fact-sheets\/common-name-listing\/hornets-wasps-and-yellowjackets\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hornets, Wasps and Yellowjackets - Home and Garden IPM from Cooperative Extension - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"Many of Maine&#8217;s hornets, wasps and yellowjackets are members of the Vespidae family of insects. Most vespid wasps are social insects and most are capable of repeatedly stinging if they feel threatened or feel their nest is in danger. 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