Ken, I'm getting large and small Hydriomena at the same time. The reason could be something as simple as females being larger than males. Bob ----------------------- On Apr 15, 2012, at 3:05 PM, kjchilds wrote: > The other things to consider are size and flight period. All my early season > Hydriomena were significantly larger than what I've seen recently. There was > a week of large ones, a break for 10 days or so and then the smaller ones > started showing up. Having said that, I haven't had the time to research this > myself and of course this has been a tough year to use normal flight periods > in identification. > > Seabrooke Leckie said that there are field marks listed for the species in > her new field guide but that even with those, "all Hydriomena identifications > should be approached with caution". I haven't seen the guide myself but maybe > someone that has a copy can look into this. > > Ken Childs > Henderson, TN > Chester County ------------------------ Bob Perkins Woodlawn, Virginia Historian and General Outdoorsman