That's the reason I thought I'd post. I believe two of my really dark striped chipmunk are male.
Fascinating comment. .. Regardless of their down they are feathering very similar. We knew this on paper but watching them feather the same from different down is really rather mind boggling... like you were drinking a coke and accidently picked up someone's root beer and your brain goes "wrong, wrong, wrong! " ROFL
LOL. My daughter just came in and saw pics of your birds and wanted to know what pen they were in. She thought they were pics of my F1's, lol.
Penny
LOL. There's a reason for that. ;-)