I don’t pretend to be an ornithologist, but from my limited observation, it seems that the egret chicks to do the most beak pulling do the most eating. Perhaps this is why chicks eagerly try to be first in line to tub on their parents beaks. Photo taken at the Audubon Society’s Smith Oaks Rookery in High Island, Texas with a Nikon D4S and 800mm f5.6 Nikkor.