Stock photography picture of Common Terns Sterna Hirundo feeding flock at waters edge norfolk UK June

AXB81G - Licenced Caption Common Terns Sterna Hirundo feeding flock at waters edge norfolk UK June Description Common tern Sterna hirundo Identification Tips: Length: 14 inches Wingspan: 31 inches Sexes similar Dives into water for prey Medium-sized tern with slender, pointed bill Long, deeply forked tail Smoothly rounded head without crest Pale underwing with broad, blurry, dark trailing edge Gray upperwing with dark outer primaries (variable according to state of condition of plumage) Window of translucent primaries shows through wings on inner primaries and outer secondaries Alaskan birds can have all dark bills and brown legs Can take three years to reach full adult plumage