Alternate plumage, Bolsa Chica, Orange Co., 4-06. © John  C. Avise.

Forster's Tern

Sterna fosteri

Charadriiformes; Laridae

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Alternate plumage, Santa Ana River mouth, Orange Co., 5-07. © John  C. Avise.

Basic plumage, Bolsa Chica, Orange Co., 4-06. © John  C. Avise.

Basic plumage, Bolsa Chica, Orange Co., 3-09. © John  C. Avise.

Alternate plumage, Bolsa Chica, Orange Co., 5-07. © John  C. Avise.

Alternate plumage, Bolsa Chica, Orange Co., 4-06. © John  C. Avise.

Alternate plumage, Bolsa Chica, Orange Co., 5-07. © John  C. Avise.

Alternate plumage, Bolsa Chica, Orange Co., 5-07. © John  C. Avise.

Alternate plumage, Bolsa Chica, Orange Co., 5-07. © John  C. Avise.

Alternate plumage, Bolsa Chica, Orange Co., 4-06. © John  C. Avise.

Basic plumage, Bolsa Chica, Orange Co., 3-06. © John  C. Avise.