Spotted Wing Drosophila
From Penn State
Drosophila suzukii was first found in the Northeastern U.S. in 2011 and has been problematic ever since.
There are a number of characteristics that differentiate SWD from other common vinegar (fruit) flies.
There are several fruit fly species in Pennsylvania that may be mistaken for D. suzukii. Make sure there is a proper identification before taking action.
From Oregon State University.