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Joined: 13 Mar 2011
Posts: 198
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 Posted: Thu Mar 17, 2011 7:02 pm Post subject: The Brown Creeper |
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The Eurasian Treecreeper belongs to the northern group, along with the North American Brown Creeper, C. americana, the Short-toed Treecreeper, C. brachydactyla, of western Eurasia, and, if it is considered a separate species, Hodgson's Treecreeper, C. hodgsoni, from the southern rim of the Himalayas.[7]
The Brown Creeper has sometimes been considered to be a subspecies of Eurasian Treecreeper, but has closer affinities to Short-toed Treecreeper, and is normally now treated as a full species.[2] Hodgson's Treecreeper is a more recent proposed split following studies of its cytochrome b mtDNA sequence and song structure that indicate that it may well be a distinct species from C. familiaris.[7]
There are nine to twelve subspecies of Eurasian Treecreeper, depending on the taxonomic view taken, which are all very similar and often interbreed in areas where their ranges overlap. There is a general cline in appearance from west to east across Eurasia, with subspecies becoming greyer above and whiter below, but this trend reverses east of the Amur River. The currently recognised subspecies are as follows:[2]online shipping insurance
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