I'm not an expert by any means but um, er, well, you got a lot of sturdy looking legs thereOkay you EE experts... I have another batch of babies who are 3.5 weeks (will be 4 weeks on Monday). I would LOVE some attempts at guesses. I can't really tell them apart, but I can look out for those with similar coloration and watch how it develops.

The red on the wings of #1 are of concern.
Bruce