His beak is open to sing!
But what else do you notice about this robin's beak?
The small hook on the end could help the robin hold and carry more food or nesting materials. Robins don't need much of a hook on the beak. Unlike eagles or raptors, they do not need a strong hook to rip apart their prey. A small hook is just a little extra help for carrying things.
Photo: Laura Erickson