Unfortunately, this is their diet:
"American white pelicans often hunt for food in groups. They will form a line and start swimming towards shore while flapping their wings and herding their prey towards the shore. Sometimes, one group of pelicans will even drive the prey towards another group of pelicans! The American white pelican eats up to
three pounds of fish per day. It also eats salamanders and crayfish." (credit:
http://www.nhptv.org/natureworks/whitepelican.htm)
So a group of 15 or 20 can really hammer the fish in a pond.
