SOUTHEASTERN CARIBBEAN BIRDS PHOTO GALLERY

Trinidad & Tobago Field Naturalists' Club    Southeastern Caribbean Bird Alert    Trinidad & 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'.