Eclectus, CAG, BH Pionus, Maximilian’s Pionus, Quakers, Indian Ringnecks, Green Cheeked Conures, Black Capped Conures, Cockatiels, Lovebirds, Budgies, Canaries, Diamond Doves, Zebra Finches, Society F
And I don't know if this is proven or not, but in my experience, males are more streamlined, where as females tend to have a larger (at least poofier?) head, but I have no science to back this up.
Thank you silver sage! And that is very interesting, I haven't heard about the streamlined body for males before, thanks Aquila! you guys are super helpful thank you.