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BOURC Taxonomic recommendations for British birds: seventh report

 
 

This page contains 6 reader comments. Click here to view (latest Mon 02/01/12 16:50).

In their latest report, the Taxonomy Sub-Committee of the British Ornithologists' Union Records Committee (BOURC-TSC) have made a number of suggestions that, if accepted, could see many birders gaining at least two armchair ticks.

Headline news from a British birder's point of view is the addition of two species to the British list. Hudsonian Whimbrel is recommended to be recognised as a distinct monotypic species (variegatus remains as a subspecies of Eurasian Whimbrel).

Whimbrel
Eurasian Whimbrel, Caernarfon, Gwynedd (Photo: Adam Hough)

Hudsonian Whimbrel
Hudsonian Whimbrel, Fair Isle, Shetland (Photo: Mark Breaks)

A split of Stonechat into three species is also recommended: African, European (with subspecies rubicola and hibernans), and Siberian (including subspecies maurus, variegatus, armenicus and stejnegeri). The latter two species appear in Category A of the British List.

European Stonechat
European Stonechat, South Stack RSPB, Anglesey (Photo: Bob Jones)

Siberian Stonechat
Siberian Stonechat, Bahrain (Photo: Adrian Drummond-Hill)

Also of potential interest to British birders are two recommendations for trans-Atlantic splits: Cabot's (American Sandwich) Tern, including the subspecies eurygnatha "Cayenne Tern", is split from European Sandwich Tern, and Snowy Plover is split from Kentish Plover. The former taxon is already on the British list on the basis of a ringed bird found dead in Herefordshire in 1986; there is also a record of a ringed bird found dead in the Netherlands.

Cabot's (American Sandwich) Tern
Cabot's (American Sandwich) Tern, United States (Photo: Geoff Athey)

Also noteworthy is the split of 'great skuas': Great Skua, Chilean Skua, South Polar Skua and Brown Skua; though the paper notes that "further field and molecular studies are warranted to firmly establish the taxonomic status of the southern skua taxa". Azorean Bullfinch is elevated to full-species status, as is east Asia's Brown-cheeked Rail (split from Water Rail). Pale Martin is split from Sand Martin and Bermuda Petrel is split from Black-capped Petrels.

Of less immediate concern to field birders, a host of refinements to relationships between species has seen several changes in genera. Thick-billed Warbler now sits with Eastern Olivaceous Warbler, Booted Warbler and Sykes's Warbler in the genus Iduna; Dendroica is no more, with Setophaga now being the favoured genus, while several other North American wood-warblers on the list have also seen their scientific names change. The chat–flycatcher complex receives a good shake-up with Siberian Blue and Rufous-tailed Robins moving from Luscinia to become Larvivora and Siberian Rubythroat becoming Calliope; the order of genera within the list has also changed with the 'brown' flycatchers — including Spotted Flycatcher — now coming between scrub-robins and Robin and 'pied' flycatchers sitting between Red-flanked Bluetail and redstarts.

Spotted Flycatcher
Spotted Flycatcher, Old Gore, Herefordshire (Photo: Mick Colquhoun)

The full paper, published in Ibis, can be viewed online at http://onlinelibrary.wiley.com/doi/10.1111/j.1474-919X.2011.01155.x/pdf.

Related pages

Whimbrel Whimbrel
Sandwich Tern Sandwich Tern
Stonechat Stonechat
Siberian Stonechat Siberian Stonechat
Hudsonian Whimbrel Hudsonian Whimbrel
Cabot's Tern Cabot's Tern


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BOURC Taxonomic changes to the British List BOURC Taxonomic changes to the British List
The following recommendations relating to the taxonomy of birds on the British List will take immediate effect with the publication of the BOURC Taxonomic Subcommittee's (BOURC TSC) report in Ibis read on read on


The information in this article was believed correct at the time of writing. BirdGuides accepts no responsibility for errors, or for any consequences of acting on information in the article. The opinions expressed are those of the author(s) and are not necessarily shared by BirdGuides Ltd.

hide section Reader comments (6)

#1
Of the species splits proposed, I wonder if any have been assessed against the new quantitative criteria for determining species, published in Ibis last year by Joe Tobias et al (Ibis 152: 724–746, October 2010)? Indeed, a shame Ibis editors did not suggest as such.
   James Lowen, 10/09/11 05:53Report inappropriate post Report 
#2
Presumably there will need to be a complete review with all records of 'Sandwich' Tern which do not explicitly exclude 'Cabot's' relegated to indeterminate.
   Hugh Pugh, 10/09/11 11:40Report inappropriate post Report 
#3
Would be interested to know how to ID Cabot's tern. Anyone know the refs for doing this?
   Ken Tucker, 11/09/11 23:34Report inappropriate post Report 
#4
There is an excellent paper by Garner et al. that deals with identification of Cabot's Tern.
Garner, M., Lewington, I. & Crook, J. (2007). Identification of American Sandwich Tern (Sterna sandvicensis acuflavida). Dutch Birding 29: 273 – 287
   Stephen Menzie, 12/09/11 08:28Report inappropriate post Report 
#5
Hi Ken hope your well. Same paper on Cabot's Tern also available via this route (perhaps not immediately obvious): http://birdingfrontiers.com/memory-sticks/ Cheers Martin
   Martin Garner, 13/09/11 09:27Report inappropriate post Report 
#6
The Sandwich/Cabot's Tern paper is also downloadable as a PDF from: http://www.nabirding.com/wp-content/uploads/2011/09/Sandwich-Cabots-Terns-Garner-et-al-2007-1.pdf
   Hugh Pugh, 02/01/12 16:50Report inappropriate post Report 

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