Taxonomic Swap 132982 (Committed on 29-10-2023)

Gelochelidon macrotarsa is split from Gull-billed Tern Gelochelidon nilotica (Clements 2007:104–105)
Australia now has a breeding endemic tern species with the split of the Australian Tern, which differs from the widespread Gull-billed Tern in numerous often subtle ways. Non-breeders of the two overlap at least from eastern Indonesia to northwestern Australia, though they are often identifiable given adequate views or photos.

eBird/Clements Checklist v2023 (Citation)
Added by donalddavesne on 29 October, 2023 20:07 | Committed by donalddavesne on 29 October, 2023
replaced with


so for areas of Australia outside the overlap zone in the northwest, all records should be macrotarsa, correct?

Posted by thebeachcomber 6 months ago

Yes, we haven't validated the taxon split yet, but that should be it. Once it's validated, everything from the Australian east coast should automatically become the new species.
ebird explains it pretty well:

Posted by donalddavesne 6 months ago

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