Endemic Bird Species of the UK

Hello! Thank you for clicking on this link, thus venturing into the labyrinth of precisely what is considered an endemic species of bird in the UK. First, let's pull at the key thread: is the Red Grouse really an endemic species? As of 2024, the answer is unequivocally yes: our Grouse is no longer considered a subspecies of the Willow Ptarmigan. In fact, this is a return to full species-hood, as the Grouse was formerly considered a species until the 1970s, when it faced the shame of the subspecies.
 

And speaking of shame, what of the Scottish Crossbill? From 2022, the Scottish Birds Records Committee (SBRC) no longer accepts records of this bird: take all the fancy recordings you like, argue over minuscule head and bill measurements, there's simply no way to tell them from Parrot or Common Crossbill in the field. This means that the only observable UK endemic is the Grouse; the Scottish Crossbill can't be ticked.

Some of the world's great bird lists have held stubbornly onto the Scottish Crossbill, but when the differences between birds are so slight, there's only one future: demotion to subspecies. So while the IOC and Avibase still, for now, count the Scottish Crossbill, it is highly likely that they too will follow the example of Western Palearctic passerine experts Svensson et al., lumping the Scottish with the Common Crossbill in the Collins Bird Guide.

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One final detail for the truly keen: it should be pointed out that the Red Grouse is technically endemic to the British Isles rather than the UK only, although the vast majority of its population resides in this country and not the Republic of Ireland.

Cheers!
 

- Matt

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