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Norwich, United Kingdom

Porter R.F.,C o BirdLife International | Kirwan G.M.,74 Waddington Street
Bulletin of the British Ornithologists' Club | Year: 2010

The resident, short-winged Buteo population on Socotra, despite having been known for over 110 years, has never been formally named. Now that it has been extensively studied in the field and its characters understood, we believe that it should be described. Like all other members of the B. buteo superspecies (sensu Kruckenhauser et al. 2003), it is relatively poorly differentiated genetically from most Old World buzzards, but is closest to B. (b.) bannermani of the Cape Verde Islands and the comparatively widespread Long-legged Buzzard B. rufinus of the southern Palearctic. It shares morphological features with several other Afrotropical buzzards, especially B. oreophilus, and B. buteo vulpinus, but is clearly well differentiated from B. rufinus and B. (b.) bannermani in this respect. Taxonomie judgements concerning this superspecies are inherently problematic because it represents an obviously recent radiation and because of difficulties in establishing which characters might be considered taxonomically informative. We elect to describe this population at species rank to highlight its highly unusual position within the superspecies, both genetically and morphologically. Finally, we present notes on its breeding biology (season September-April), population size (<250 pairs), behaviour (similar to Common Buzzard B. buteo), diet (reptiles and invertebrates), moult (November to April) and conservation prospects (the taxon should probably be ranked as Vulnerable according to IUCN criteria). © British Ornithologists' Club 2010. Source

Kirwan G.M.,74 Waddington Street
Bulletin of the British Ornithologists' Club | Year: 2011

Long-tailed Manakin Chiroxiphia linearis has long been considered a polytypic species, with C. I. linearis in the north of the range (southern Mexico to Guatemala) and C. J. fastuosa in the south (from El Salvador to northern Costa Rica). Despite that no biogeographical barriers are known in the central region of the species range and that monotypy has already been suggested, this treatment has persisted for almost 90 years. A morphological investigation (plumage and mensural data) reported here suggests that C. linearis is better treated as a monotypic species. © British Ornithologists' Club 2011. Source

Bessa R.,Rua Lucidio Lago 389 | Parrini R.,Rua Desembargador Isidro 160 | Abdala A.,Rua Comendador Machado 114 | Kirwan G.M.,74 Waddington Street | And 2 more authors.
Cotinga | Year: 2011

We present the first records of 43 bird species for the Serra da Canastra region located in south-west Minas Gerais state, Brazil. Notes on geographic distribution and range expansion, as well as breeding, are discussed for some species. The record of White-cheeked Pintail Anas bahamensis reported here appears to be the first for Minas Gerais, while that of Blue-tufted Starthroat Heliomaster furcifer is apparently the third documented occurrence in the state, and that of Plumbeous Rail Pardirallus sanguinolentus one of the few records within the Cerrado biome. Source

Kirwan G.M.,74 Waddington Street | Grieve A.,Second Avenue Software
Bulletin of the British Ornithologists' Club | Year: 2010

We discuss subspecific limits in Coal Tit Periparus ater in Iran and immediately adjacent regions. Three races are generally accepted as occurring in the country, one of them, P. a. phaeonotus, known only from four specimens collected in the Zagros Mountains of south-west Iran. We speculate that the type series of the latter taxon might have been incorrectly labelled as to date, and that the species is only a rare winter visitor to this region of the country. The other subspecies listed as occurring in Iran, P. a. gaddi and P. a. chorassanicus, are only extremely doubtfully distinct from phaeonotus. © British Ornithologists' Club 2010. Source

Kirwan G.M.,74 Waddington Street | Bodrati A.,Proyecto Selva de Pino Parana | Bodrati A.,Maimonides University | Cockle K.,Proyecto Selva de Pino Parana | And 2 more authors.
Ornitologia Neotropical | Year: 2010

There are few data concerning the breeding biology of the Near Threatened Atlantic Forest endemic, the Bay-ringed Tyrannulet Phylloscartes sylviolus. Here, we describe four nests from eastern Paraguay, northeast Argentina and southeast Brazil, all found at various stages of construction. All four nests can be described as closed/globular/lateral, or perhaps closed/retort/pensile, according to the recent classification scheme for nests of Neotropical birds. Nests were mostly green, constructed of live moss, seed down, other plant fibers, spider webs, and lichen. Both adults contributed to nest-building. The single egg we observed was clean white. Recent molecular studies have found strong support for a close relationship between Phylloscartes and the genus Pogonotriccus, and have even suggested that additional sampling might support their reunification; a recent study of nest architecture, in contrast, proposes that Phylloscartes is more similar to Leptopogon and Mionectes. Our review of nest architecture data for these genera suggests a much greater degree of plasticity than has heretofore been recognized, at least within Phylloscartes, and striking similarities between the nests of Phylloscartes and Pogonotriccus. Other genera, especially Mionectes and Leptopogon, build obviously different types of nests. The system for categorizing nests of Neotropical birds devised by Simon & Pacheco (2005), while not always perfect, merits greater use by ornithologists describing nests, in order to facilitate future comparisons. Accepted 8 August 2010. © The Neotropical Ornithological Society. Source

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