flying caspian tern hydroprogne caspia with a freshly caught fish in its beak, followed closely by a second one, blue sky

above adult america animal area bay beak beautiful bird birds black breeding california caspia caspian close copy courtship detail feather fish flight fly francisco free freedom gull hydroprogne large migrating migration natural nature ocean orange pair san sea seabird seagull shorebird soaring space spread states tern two united usa white wild wildlife wing wings