Western Palearctic black-and-white flycatchers
- Western Palearctic black-and-white flycatchers
The term Western Palearctic black-and-white flycatchers is used to refer to a group of similar-looking birds in the genus "Ficedula":
* Atlas Flycatcher "F. speculigera" which breeds in Northwest Africa
* Collared Flycatcher "F. albicollis" which breeds in Eastern Europe
* European Pied Flycatcher "F. hypoleuca" which breeds in Western Europe
* Semi-collared Flycatcher "F. semitorquata" of Southeast Europe and Southwest Asia
European Pied and Collared Flycatchers hybridise to a limited extent where their ranges meet; the hybrids have reduced fitness and usually do not survive their first winter (Parkin 2003). Female hybrids are usually sterile (Gelter "et al." 1992; "see also" Haldane's Rule).
All species leave their breeding grounds to winter in Sub-Saharan Africa.
Identification of these birds, especially in female and immature plumages is considered difficult, and several identification papers have been published on the subjectFact|date=February 2007.
References
* Gelter, H. P.; Tegelström, H. & Gustafsson, L. (1992): Evidence from hatching success and DNA fingerprinting for the fertility of hybrid Pied × Collared Flycatchers "Ficedula hypoleuca – albicollis". "Ibis" 134(1): 62–68.
* Parkin, David T. (2003): Birding and DNA: species for the new millennium. "Bird Study" 50(3): 223–242. [http://www.ingentaconnect.com/content/bto/bird/2003/00000050/00000003/art00003 HTML abstract]
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