The IPM team at Penn State University has put together several nice fact sheets on spotted wing drosophila (SWD) in the last several months. I particularly like the images of non SWD males in this fact sheet and the character summaries illustrated here. I've used these images to illustrated SWD characters to participants in the SWD*VMN and extension agents monitoring for SWD.
More information
Spotted wing drosophila pest alert - Penn State University Extension
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