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Medium-Sized Terns

Common Tern
(පොදු මුහුදුලිහිනියා)
Sterna hirundo

Based on size, the grey upperparts, hint of red in the beak, I believe these are Common Tern's in non-breeding plumage. Observed and photographed at Bundala National Park, there were 4 of them at the edge of a water hole.

Doubtful identification
Critically Endangered
Common Tern
Roseate Tern
(අරුනු මුහුදුලිහිනියා)
Sterna dougallii

Yet to capture image

Critically Endangered
Roseate Tern
Black-naped Tern
(කලු-ගෙලැසි මුහුදුලිහිනියා)
Sterna sumatrana

Yet to capture image

Vagrant species
Black-naped Tern
Bridled Tern
(කඩියාලම් මුහුදුලිහිනියා)
Onychoprion anaethetus

Yet to capture image

Vagrant species
Critically Endangered
Bridled Tern
Sooty Tern
(දුම්බුටු මුහුදුලිහිනියා)
Onychoprion fuscatus

Yet to capture image

Vagrant species
Critically Endangered
Sooty Tern
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