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Thalasseus
genus of Sternidae within Charadriiformes

trivial name latin name name specimens
Great Crested-Tern
Thalasseus bergii 		Thalasseus bergii 001 001
Sandwich tern
Thalasseus sandvicensis 		Thalasseus sandvicensis 004 004
Lesser Crested-Tern
Thalasseus bengalensis 		Thalasseus bengalensis 001 001
Royal Tern
Thalasseus maximus 		Thalasseus maximus 001 001

Species comparison1)

Genus Thalasseus: maximal number primaries: 10, maximal number secondaries: 22, maximal number retrices: 12
1) According to Hartmann (2000a, 2000b and 2016)

Random specimens

Sandwich tern
Thalasseus sandvicensis
Royal Tern
Thalasseus maximus
Great Crested-Tern
Thalasseus bergii
Sandwich tern
Thalasseus sandvicensis
Sandwich tern
Thalasseus sandvicensis