We were watching an episode on Birds from the excellent BBC / Discovery channel nature series Life. We were particularly impressed as we watched great white pelicans wade into a nursery of unprotected gannett chicks and swallow them live. One after another.
We've always thought Pelicans sort of cuddly and fun. Not so much any more.
We couldn't find a video of the bird massacre, but we found it about as disturbing as this clip of hornets slaughtering a bee colony, and then eating their babies. I guess the lesson here, no surprise really, is that babies are yummy.