Thanks for the discussion. I have worked as an entomologist for the past 40+ years, and having to translate insect biology to professors on one hand and farmers on the other, I can definitely appreciate that words make a difference. From the insect world, immature is pretty accepted for all non-adult stages, but the terms larva, pupa, sub-imago, etc., definitely transfer more information than the more general term.
I have been using the heck out of the AAB site, but recognize that it has limitations. I also haven't bought a field guide since I got a copy of RT Peterson's book many years ago (now falling apart). I am open to suggestion regarding a good field guide, if for no other reason than I feel a bit guilty coming to you guys every time I have a question. ...that and I still enjoy learning.
I also have a question about posting photos to topics on this site (especially related to European birds) where the posting needs to have a URL. WTF?? How do I do that???