Nazca booby chick and egg

A Nazca booby (Sula granti) with a chick and egg. When the second egg hatches, any siblings present will almost certainly kill their younger brother or sister
A Nazca booby (Sula granti) with a chick and egg. When the second egg hatches, any siblings present will almost certainly kill their younger brother or sister. By Erlkonig at English Wikipedia, CC BY 3.0

A Nazca booby (Sula granti) with a chick and egg. When the second egg hatches, any siblings present will almost certainly kill their younger brother or sister