Saturday, August 9, 2014
In the recent Peterson guide, N. rubrifrontaria looks similar, but the records are rather scattered for the midwest, and it has not been officially recorded in Ohio. To keep them all apart, look for three things. 1) Is the wing edge fringed in red or just white. 2) Is the body spotted, striped or plain green. 3) Is the large white line in the wings straight (like this one) or zig-zag and wavy.
Summer Fishflies differ from Spring Fishflies by their seasonal flight period. If you happen to be at that spring to summer time overlap, look at the thorax. Click on the photo and you'll see yellow spots on this species. They are lacking on the spring species.