NBG eagles. How to tell them apart.

Congowings: (moderator on NBG chat)

It is easier to see differences when they are both side by side: however, the female is larger than male, including larger feet, bigger beak (upper mandible is deeper & mouth goes back farther under eye). On this particular pair: male has a sleeker look (flatter head when feather’s aren’t ruffled), the female’s head appears rounder. When looking close, it almost looks like male has eyeliner on his eyes.