Common Gull-billed Tern with Australian Gull-billed Terns, Queensland

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Michael Szabo
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Common Gull-billed Tern with Australian Gull-billed Terns, Queensland

Postby Michael Szabo » Tue Mar 14, 2023 11:00 am

Greg Roberts has posted these useful photos to Facebook showing a Common Gull-billed Tern (affinis) with Australian Gull-billed Terns (macrotarsa) currently at Maaroom on the Queensland coast.
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Common Gull-billed Tern on the right (smaller)
335164618_1578287952689922_8265793432566135896_n.jpg (160.35 KiB) Viewed 3250 times
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Common Gull-billed Tern in the centre (smaller).
335396574_716914356644277_3812032890807609543_n.jpg (154.58 KiB) Viewed 3250 times
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Common Gull-billed Tern on the left (smaller).
335057215_533677322224920_2589860985310074836_n.jpg (284.1 KiB) Viewed 3250 times
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Michael Szabo
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Common Gull-billed Tern + Australian Gull-billed Terns, Maaroom, Queensland

Postby Michael Szabo » Fri Jun 02, 2023 8:47 am

I took these photos of a Common Gull-billed Tern and an Australian Gull-billed Tern right next to each other at Maaroom in Queensland recently on 6/4/23. They show the main distinguishing features of Common GBT in non-breeding plumage - smaller overall size, shorter and straighter bill, small dark eye patch, clean white cap, and darker upper parts (as set out in the Australian Bird Guide on page 107).
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Common Gull-billed Tern + Australian Gull-billed Tern, Maaroom, Queensland, 6/4/23
Common + Aus GBT_2933.JPG (326.13 KiB) Viewed 2545 times
Common + Aus GBT_2932.JPG
Common Gull-billed Tern + Australian Gull-billed Tern, Maaroom, Queensland, 6/4/23
Common + Aus GBT_2932.JPG (139.75 KiB) Viewed 2545 times
Common + Aus GBT heads_2931.JPG
Common Gull-billed Tern + Australian Gull-billed Tern, Maaroom, Queensland, 6/4/23
Common + Aus GBT heads_2931.JPG (159 KiB) Viewed 2545 times
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