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Anous minutus Anous tenuirostris Anous stolidus Sterna dougallii Sterna striata Sterna sumatrana Sterna vittata Sterna hirundinacea Sterna paradisaea Sterna hirundo Sterna forsteri Sterna trudeaui Thalasseus maximus Sterna bengalensis Thalasseus bergii Thalasseus sandvicensis Sterna elegans Chlidonias niger Chlidonias leucopterus Sterna albostriata Chlidonias hybridus Larosterna inca Gelochelidon nilotica Hydroprogne caspia Phaetusa simplex Sternula nereis Sternula albifrons Sternula antillarum Sternula superciliaris Onychoprion anaethetus Onychoprion lunatus Onychoprion fuscatus Onychoprion aleuticus Gygis alba Larus
0 6 12 18 24 Time (MYA)
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