SOUTHEASTERN CARIBBEAN BIRDS PHOTO GALLERY

Trinidad and Tobago Field Naturalists' Club         Southeastern Caribbean Bird Alert         Trinidad and Tobago Rare Bird Committee

IDENTIFICATION ESSAY

Sandwich Tern (Sterna sandvicensis acuflavida) and Cayenne Tern (S. s. eurygnatha): Page 3 of 7      Page 1: Virgin Islands (variation)      Page 2: Virgin Islands (hybridisation)      Page 3: Aruba (hybridisation)      Page 4: Tobago      Page 5: Brazil      Page 6: Argentina      Page 7: Argentina

Courtship feeding by a male Cayenne Tern (with two fish) to a female Sandwich-type Tern at Aruba, 1 June 1989. Photo © by Ruud van Halewijn. This photo demonstrates hybridization between 'eurygnatha' and presumed 'acuflavida', or between bill colour morphs of if the dark-billed individual is a dark-billed morph of 'eurygnatha'.