Marsh Terns, Little and Saunder's Terns

Whiskered Tern-1
Whiskered Tern-1

Photographed in Mannar.

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Whiskered Tern-2
Whiskered Tern-2

Photographed in Mannar.

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Whiskered Tern-4
Whiskered Tern-4

Photographed in Mannar.

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Whiskered Tern-1
Whiskered Tern-1

Photographed in Mannar.

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1/4
Whiskered Tern
(අලුපියා කන්ගුල්-ලිහිනියා)
Chlidonias hybrida

Based on the size of the beak and the black on the head extends to nape but does not drop below the eye, I believe this is a Whiskered Tern.

 

Seen in Mannar.

Doubtful identification
 
White-winged Tern-1
White-winged Tern-1

Photographed in Mannar.

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White-winged Tern-2
White-winged Tern-2

Photographed in Mannar.

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White-winged Tern-3
White-winged Tern-3

Photographed in Mannar.

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White-winged Tern-1
White-winged Tern-1

Photographed in Mannar.

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1/3
White-winged Tern / White-winged Black Tern (සුදුපියා කන්ගුල්-ලිහිනියා)
Chlidonias leucopterus

Based on the fact that the black eye-strip drops behind the eye and the dull orange legs, I believe this is a White-winged Tern. This is a difficult identification as the smaller Tern's have similar features. If someone thinks I have made an incorrect identification, please let me know.

Seen at Mannar.

Doubtful identification
 
Still to capture photo
Still to capture photo

Still waiting to get lucky and capture image.

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Still to capture photo
Still to capture photo

Still waiting to get lucky and capture image.

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1/1
Saunders's Tern
(සෞන්ඩර්ස් මුහුදුලිහිනියා)
Sternula saundersi

Yet to capture image

Critically Endangered
 
Little Tern-1
Little Tern-1

Photographed in the outskirts of Matara.

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Little Tern-2
Little Tern-2

Photographed in the outskirts of Matara.

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Little Tern-3
Little Tern-3

Photographed in the outskirts of Matara.

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Little Tern-1
Little Tern-1

Photographed in the outskirts of Matara.

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1/3
Little Tern
(පුන්චි මුහුදුලිහිනියා)
Sternula albifrons

Although I only saw them flying around without settling down, based on the size, the white forehead and wing patterns, I'm fairly certain this is a Little Tern. Seen at a marsh on the outskirts of Matara.

 
Still to capture photo
Still to capture photo

Still waiting to get lucky and capture image.

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Still to capture photo
Still to capture photo

Still waiting to get lucky and capture image.

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1/1
Black Tern
Chlidonias niger

Yet to capture image