>>36185997Nope, even though their hormonal development stops altogether. They will act and look like males, no longer laying eggsn and often becoming the dominant ones for species livings in packs (rooster and hens, for example).
The reverse is also partially true, as young males will look indistinguishable from females not to get attacked by rival, older males, but developp into adults once the time to reproduce has come.
Point in case, checking the gender of a bird without defining sexual dimorphism is often only possible through DNA testing. They are still dinosaurs, very primitive creatures, and when we see that some reptiles can clone themselves without fertilisation, and species of fish really change gender and are fertile either way, we can see that defined sexual organs are really only a mammal thing.
Nature is truly weird, and fucking interesting.
