Editing Caspian tern (section)

==Behaviour==

===Feeding===
They feed mainly on [[fish]], which they dive for, hovering high over the water and then plunging. They also occasionally eat large [[insect]]s, the young and eggs of other birds and rodents. They may fly up to {{convert|60|km|mi|abbr=on}} from the breeding colony to catch fish; they often fish on freshwater lakes as well as at sea.<ref name=lynx/><ref name=mullarney/>

===Breeding===
[[File:Hydroprogne caspia MWNH 0386.JPG|thumb|Egg, Collection [[Museum Wiesbaden]]]]
Breeding is in spring and summer, with one to three pale blue-green eggs, with heavy brown spotting, being laid. They nest either together in colonies, or singly in mixed colonies of other tern and [[gull]] species. The nest is on the ground among gravel and sand, or sometimes on vegetation; incubation lasts for 26–28 days. The chicks are variable in plumage pattern, from pale creamy to darker grey-brown; this variation assists adults in recognizing their own chicks when returning to the colony from feeding trips. Fledging occurs after 35–45 days.<ref name=lynx/>