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Gull-Billed or Whiskered Terns?

Bandrew

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1# A A A Post at 2/06/2017 23:14  Show author

Gull-Billed or Whiskered Terns?

Taken at Sai Kung 30th May.

Can someone please help me to decide if these are both Whiskered or Gull-billed terns.

Thanks in advance.

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IMG_7623t.jpg (416.14 KB)

2/06/2017 23:14

IMG_7623t.jpg

Whiskered Tern.jpg (549.12 KB)

2/06/2017 23:14

Whiskered Tern.jpg

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ajohn

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2# A A A Post at 3/06/2017 07:45  Show author
Both Whiskered Terns. The first one is only partly in breeding plumage. Notice the dark underparts and dark red bill characteristic of breeding-plumage Whiskered.

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