Alan Murphy/ BIA / Forster's Tern (Sterna forsteri) flying, Texas

John Chan / Forster's tern (Sterna forsteri) plunge diving for a fish, Southern California, USA, June.

John Chan / Forster's tern (Sterna forsteri) plunge diving for fish in a saltmarsh estuary, Southern California, USA, May.

Suzi Eszterhas / Forster's tern (Sterna forsteri) perched on post. Elkhorn Slough, Monterey Bay, California, USA. February.

John Chan / Forster's tern (Sterna forsteri) diving for a fish from a railing, Bolsa Chica Ecological Reserve, California, USA, June.

Sebastian Kennerknecht / Forster's Tern (Sterna forsteri), Elkhorn Slough, Monterey Bay, California

Jan Wegener / Forster's Tern (Sterna forsteri), Texas

LYNN M. STONE / Forster's Tern (Sterna forsteri) in breeding plumage. Petersburg, Florida, USA, April.

Gerrit Vyn / Forster's tern (Sterna forsteri) in basic plumage, Malheur County, Oregon, USA September

Michael D. Kern / Forster's tern (Sterna forsteri) ground nest with three eggs beside Samphire plants, California, USA.

Michael D. Kern / Forster's tern (Sterna forsteri) in flight, calling, California, USA.

Michael D. Kern / Forster's tern (Sterna forsteri) fledgling being monitored, part of the San Francisco Bay Bird Observatory (SFBBO) USGS field work study, California, USA. June 2009

Michael D. Kern / Forster's tern (Sterna forsteri) chicks in plastic containers for monitoring, part of the San Francisco Bay Bird Observatory (SFBBO) USGS field work study, California, USA. June 2009

Michael D. Kern / Forster's tern (Sterna forsteri) nest with four eggs, California, USA.

Michael D. Kern / Flags mark the site of Forster's tern (Sterna forsteri) nests on rocky shore, California, USA. San Francisco Bay Bird Observatory (SFBBO) field work. June 2009

Michael D. Kern / Forster's tern (Sterna forsteri) egg laid on tide line amongst beach debris, California, USA.

Michael D. Kern / Forster's tern (Sterna forsteri) chick hatching from egg, California, USA.

Guy Edwardes / Forster's tern (sterna forsteri) stretching wing, Fort De Soto, Florida, USA, March

Hanne & Jens Eriksen / Forster's tern {Sterna forsteri} in flight, Texas, USA

Rolf Nussbaumer / Forster's Tern (Sterna forsteri), winter plumage, Port Aransas, Texas, USA. March 2003

Rolf Nussbaumer / Forster's Tern (Sterna forsteri) preening, Welder Wildlife Refuge, Sinton, Texas, USA. June 2005

Shattil & Rozinski / Forster's tern {Sterna forsteri} flying over Bear River, Utah, USA

Rolf Nussbaumer / Forster's tern {Sterna forsteri} standing in water profile, Welder Wildlife Refuge, Sinton, Texas, USA.

Rolf Nussbaumer / Forster's tern {Sterna forsteri} pair mating, Welder Wildlife Refuge, Sinton, Texas, USA.

Robin Chittenden / Forster's tern (Sterna forsteri) standing in shallow water, New Jersey, USA, September

Charlie Summers / Forster's tern (Sterna forsteri) risingfrom water after catching a small fish, North Park, Colorado, USA.

John Chan / Juvenile Forster's tern (Sterna forsteri) calling out, begging to be fed, amongst Sand verbena (Abronia umbellata), Bolsa Chica Ecological Reserve, Southern California, USA, June.

John Chan / Juvenile Forster's tern (Sterna forsteri) stretching its wings while roosting amongst a bed of Sand verbena (Abronia umbellata), Bolsa Chica Ecological Reserve, Southern California, USA, June.

John Chan / Forster's terns (Sterna forsteri) diving for fish, Bolsa Chica Ecological Reserve, Southern California, USA, August.

John Chan / Forster's tern (Sterna forsteri) diving and catching a fish, Bolsa Chica Ecological Reserve, Southern California, USA.