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Frequent Specimens - Fruit Flies

Fruit Flies
Pair of Spotted Wing Drosophila flies (male on left; female on right)Genus “Drosophila” is the genus name for what we call “fruit flies” or, sometimes pomace, vinegar, or wine flies, which speaks to their propensity–in the case of many species–for hanging around and feeding on overripe or rotting fruit.  The entire genus, however, contains more than 1,500 species and is very diverse in appearance, behavior, and breeding habitat.  The larvae of at least one species, Drosophila suzukii, which in Maine we know primarily by the name of Spotted Wing Drosophila or SWD for short, is a newly introduced species from Asia that can also feed in fresh fruit and has quickly become a major threat to soft-skinned fruits throughout most of the state.

Additional Resources & Photos:


Spotted-wing Drosophila fruit flies stuck to a UMaine Extension sticky trap

Spotted Wing Drosophila fruit flies (Drosophila suzukii) (a.k.a. the Asian fruit fly) stuck to a UMaine Extension sticky trap; The males have a prominent, dark spot on each wing, as can be seen in this photo.

SpottedWingDrosophila-03

A male Spotted Wing Drosophila

Pupa of a Spotted Wing Drosophila

Pupa of a Spotted Wing Drosophila

Closeup view of the saw-like ovipositor which allows Spotted Wing Drosophila to cut into healthy soft-skinned fruits

Closeup view of the saw-like ovipositor which allows Spotted Wing Drosophila females to cut into healthy soft-skinned fruits when laying their eggs


two separate images of a Fruit Fly, on a mirror, and on a Concord grape
Left: A common household fruit fly; Right: The same fly, resting and feeding on a Concord grape

 


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