Click on the links below for more information about each indicator species. Red maple, Acer rubrum Sugar maple, Acer saccharum Ruby-throated hummingbird, Archilochus colubris Common Milkweed, Asclepias syriaca Rockweed, Ascophyllum nodosum Monarch butterfly, Danaus plexippus Forsythia, Forsythia sp. Wild strawberry, Fragaria virginiana Common loon, Gavia immer Beach rose, Rosa Rugosa Common lilac, Syringa vulgaris Common