showdown in the sky. common terns interacting in flight.

action active adult aggression air animals aves avia avian background beak birding birds blue common concept conflict courting dispute fast fauna feathers feathery fight flight flit fly habitat hirundo interacting ladoga lake life mates name natural nature ornithology rainbow ritual river scientific seabird seagulls showdown sky sterna sternidae tern terns two vertebrate white wild wilderness wildlife wings