This fluttery creek dweller was actually impressive in size. Those dark smoky wings and white spots with the floppy winged flight made it look like some damselfly from another country. We thought it was a Dobsonfly but it is, in fact, a Fish Fly. They are closely related in the family Corydalidae. We have only 24 members in the US. And five of those are Dobsonflies (two genera). Two other genera are the Fish flies. These guys are known for their dark wings (Dobsons have clear wings.) And their serrate antennae which you can see here. This is Nigronia serricornis. They have impressive jaws and I assume are predatory in their short adult life. They were quite common on this NE Arkansas creek in spring when we were walking the waterway.