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Taxonomic Recommendations for British Birds†

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Taxonomic Recommendations for British Birds† Ibis (2002), 144, 707–710 Blackwell Science, Ltd Taxonomic recommendations for British birds† ALAN G. KNOX,1* MARTIN COLLINSON,2 ANDREAS J. HELBIG,3 DAVID T. PARKIN4 & GEORGE SANGSTER5 1Historic Collections, University of Aberdeen, King’s College, Aberdeen AB24 3SW, UK 2Biomedical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZD, UK 3Vogelwarte Hiddensee, Universität Greifswald, D-18565 Kloster, Germany 4Institute of Genetics, University of Nottingham, Queen’s Medical Centre, Nottingham NG7 2UH, UK 5Stevenshof 17, 2312 GM Leiden, The Netherlands These recommendations of the Taxonomic Sub-committee of the BOU Records Committee will take effect immediately for the purposes of the British List. A paper outlining the approach of the Sub-committee to species-level decisions has recently been published (Helbig et al. 2002. Guidelines for assigning species rank. Ibis 144: 518–525). The position of Anseriformes and Black-browed Albatross Diomedea Galliformes melanophris A review has been undertaken of 26 phylogenetic Phylogenetic analyses of mitochondrial DNA studies of the basal clades of birds. This review indi- sequences (Nunn et al. 1996. Auk 113: 784–801; cates that the basal subdivisions of living birds are Nunn & Stanley 1998. Mol. Biol. Evol. 15: 1360– well resolved, and that each of the five hypotheses 1371) indicate that the albatrosses comprise four below is well supported and that these hypotheses major monophyletic groups, which are best recog- are much better supported than any alternative nized as genera: the North Pacific albatrosses hypothesis. (Phoebastria, comprising P. immutabilis, P. nigripes, The best supported alternative hypothesis, sup- P. irrorata and P. albatrus), the great albatrosses ported by four mtDNA sequence studies, suggests (Diomedea, comprising D. epomophora, D. exulans that Passeriformes is the sister-group to all other and D. amsterdamensis), the mollymawks (Thalas- living birds. Jackknife analyses of mitochondrial DNA sarche, comprising T. chlororhynchos, T. bulleri, T. sequences of all orders of living birds have shown cauta, T. chrysostoma and T. melanophris), and the that this finding may be an artefactual result of long- sooty albatrosses (Phoebetria, comprising P. fusca and branch attraction due to insufficient taxon sampling. P. palpebrata). The same studies indicate that the The following hypotheses are accepted: sooty albatrosses are the sister-group of the molly- • The most basal subdivision of living birds is that mawks rather than the sister-group to all remaining between Palaeognathae and Neognathae; albatrosses and that the genus Diomedea, as tradi- • Ratitae and Tinamiformes are sister taxa; tionally defined, is not monophyletic. We recom- • Galloanserae and Neoaves are sister taxa; mend the recognition of the genera Phoebastria and • Anseriformes and Galliformes are sister taxa; Thalassarche because this underscores the existence • Neoaves is monophyletic. of four major groups of albatrosses and eliminates Galloanserae will therefore be placed at the start paraphyly of the traditional genus Diomedea. of the British List. Within Galloanserae, Anseri- Black-browed Albatross becomes Thalassarche formes will precede Galliformes. The sequence melanophris. A paper on the generic status of alba- within the families remains unchanged for now. A trosses has been completed and will appear elsewhere. paper on this proposal has been completed and will appear elsewhere. Greater Flamingo Phoenicopterus ruber *Corresponding author. Email: [email protected] Greater Flamingo Phoenicopterus ruber roseus, Carib- †This paper is an official document of the British Ornithologists’ bean Flamingo P. r. ruber and Chilean Flamingo P. r. Union. chilensis are well-marked taxa that show consistent © 2002 British Ornithologists’ Union 708 A.G. Knox et al. differences in several functional systems: plumage Houbara Bustard C. undulata should be removed coloration and pattern, coloration of bill and legs from category A of the British List and replaced, on (e.g. van den Berg 1987. Dutch Birding 9: 2–7; Treep category B, by Macqueen’s Bustard C. macqueenii 1994. Dutch Birding 13: 17; Sangster 1997. Dutch (monotypic). A paper on the taxonomy of Houbara Birding 19: 193–198), displays and vocalizations Bustards has been completed and will appear (Studer-Thiersch 1964. Ornithol. Beob. 61: 99–102; elsewhere. Studer-Thiersch 1974. Z. Tierpsychol. 36: 212–266; Studer-Thiersch 1975. In Kear, J. & Duplaix-Hall, N. Whiskered Tern Chlidonias hybridus (eds) Flamingos: 150–158. Berkhamsted). These data indicate that Greater Flamingo, Caribbean Flamingo The correct spelling of the scientific name of the and Chilean Flamingo are best treated as separate Whiskered Tern is C. hybrida (David & Gosselin species. 2002. Bull. Brit. Orn. Club 122: 32). • Greater Flamingo P. roseus (monotypic); • Caribbean Flamingo P. ruber (monotypic); Western Palearctic taxa of Acrocephalus • Chilean Flamingo P. chilensis (monotypic). and Hippolais Greater Flamingo is at present included in categories D and E of the British List, and Chilean Flamingo in Following the publication of a number of relevant category E. papers (including Leisler et al. 1997. J. Orn. 138: A paper on the taxonomy of this group has been 469–496; Helbig et al. 1999. Mol. Phyl. Evol. 11: completed and will appear elsewhere. 246–260; Shirihai et al. 1995. Dutch Birding 17: 229–239; Svensson 2001. Birding World 14: 192–219), a reappraisal of the taxonomy of Acrocephalus and Houbara Bustard Chlamydotis undulata Hippolais warblers on the British List has been Studies of courtship behaviour and vocalizations undertaken. Of necessity, the review extended to all (Gaucher et al. 1996. Ibis 138: 273–282), mitochon- the taxa breeding in or visiting the Western Palearctic, drial DNA (Gaucher et al. 1996. Ibis 138: 273–282) and a few from further afield. After consideration, and nuclear DNA (D’Aloia 2001. Zool. Middle East we propose to treat the Western Palearctic taxa as 22: 25–35) have documented consistent differences follows: between macqueenii and undulata. Together with • Thick-billed Warbler A. aedon (polytypic, ssp. differences in plumage (Birds of the Western Palearctic aedon; extralimital: stegmanni); 2: 649–655; Gaucher et al. 1996. Ibis 138: 273–282; • Moustached Warbler A. melanopogon (polytypic, Sangster 1996. Dutch Birding 18: 248–254), these sspp. melanopogon, albiventris, mimica); data suggest that macqueenii and undulata are best • Aquatic Warbler A. paludicola (monotypic); treated as distinct species. The Canarian population • Sedge Warbler A. schoenobaenus (monotypic); C. u. fuertaventurae is treated as conspecific with C. • Eurasian Reed Warbler A. scirpaceus (polytypic, undulata based on lack of diagnostic differences in w. Palearctic sspp. scirpaceus, fuscus; extralimital: plumage (Birds of the Western Palearctic 2: 649–655), baeticatus, avicenniae and others in the Afrotropical courtship behaviour (Hinz & Heiss 1989. Bustard Region); Studies 4: 68–79) and mitochondrial DNA (Gaucher • Marsh Warbler A. palustris (monotypic); et al. 1996. Ibis 138: 273–282). • Blyth’s Reed Warbler A. dumetorum (monotypic); • Houbara Bustard C. undulata (polytypic, with • Paddyfield Warbler A. agricola (monotypic) syn- subspecies undulata and fuertaventurae); onyms: septima/us, capistrata; • Macqueen’s Bustard C. macqueenii (monotypic). • Basra Reed Warbler A. griseldis (monotypic); Houbara Bustard (sensu lato) has occurred five • Great Reed Warbler A. arundinaceus (polytypic, times in Britain. The first four birds (Lincoln 1847, sspp. arundinaceus, zarudnyi); Yorkshire 1892, 1896, Aberdeenshire 1898) were • Oriental Reed Warbler A. orientalis (monotypic, identified as Macqueen’s Bustard C. macqueenii. The extralimital); only 20th century occurrence (Suffolk 1962) was • Clamorous Reed Warbler A. stentoreus (poly- not identified to race at the time and the record is typic, w. Palearctic sspp. stentoreus, levantina, brun- being reviewed (for photographs, see British Birds nescens; others in the e. Palearctic & Indomalayan 1963, Vol. 56, Plate 61; Payn 1978. The Birds of Suf- Regions); folk, Plate 15). • Cape Verde Cane Warbler A. brevipennis (monotypic); © 2002 British Ornithologists’ Union, Ibis, 144, 707–710 Taxonomic recommendations for British birds 709 • Eastern Olivaceous Warbler H. pallida (polytypic, across western Siberia and then south around the sspp. reiseri, laeneni, pallida, elaeica); Tibetan plateau in a chain of intergrading taxa: P. t. • Western Olivaceous Warbler H. opaca (monotypic); viridanus, ludlowi, nominate trochiloides, obscuratus • Booted Warbler H. caligata (monotypic); and plumbeitarsus, although there is now a distribu- • Sykes’s Warbler H. rama (monotypic); tional break, possibly due to recent habitat loss, • Upcher’s Warbler H. languida (monotypic); between the latter two. Where viridanus and plumbe- • Olive-tree Warbler H. olivetorum (monotypic); itarsus meet in central Siberia they behave as separ- • Icterine Warbler H. icterina (monotypic); ate species. This group of taxa appears to comprise a • Melodious Warbler H. polyglotta (monotypic). ring-species. The (almost) continuous distribution and clinal variation along the chain prevents the The taxa on the British List should be treated as constituent taxa being treated as anything other than follows: a single species. • Thick-billed Warbler A. aedon (polytypic, the race In addition to the subspecies mentioned above, having occurred in Britain is unlikely to be other than P. t.
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