Sometimes it takes two parents to feed four hungry peregrine chicks.
Here are Dorothy and E2 crowded at the nest with their four growing babies at the Cathedral of Learning. Both of them were offering food and the kids could not decide which direction to face. For a while all four faced Mom... but one of them is wondering...
(photo from the National Aviary webcam at the University of Pittsburgh)
p.s. I've added new entries on the Peregrine FAQs page. Check it out.