. Bonner zoologische Monographien. Zoology. 219. : Distribution of the subspecies of Alethe poliocephala in eastern Africa band, from the more eastern subspecies A. p. akeleyae. Though a very common species of the forest undergrowth, this alethe seems to be very sedentary, as shown by a specimen ringed as an adult bird on 23 November 1979 which was retrapped at a distance of only 100 m from the ringing site nearly nine years later on 21 September 1988 (Gichuki & Schifter 1990). The White-tailed Ant-Thrush {Neocossyphus poensis) of the North Nandi Forest has been separated as N. p. nig
. Bonner zoologische Monographien. Zoology. 219. : Distribution of the subspecies of Alethe poliocephala in eastern Africa band, from the more eastern subspecies A. p. akeleyae. Though a very common species of the forest undergrowth, this alethe seems to be very sedentary, as shown by a specimen ringed as an adult bird on 23 November 1979 which was retrapped at a distance of only 100 m from the ringing site nearly nine years later on 21 September 1988 (Gichuki & Schifter 1990). The White-tailed Ant-Thrush {Neocossyphus poensis) of the North Nandi Forest has been separated as N. p. nigridorsalis. Though a rare bird in the area and confined to wetter parts near streams and swamps the bird seems to be very sedentary. The population of the Kakamega Forest has also been recently separated as N. p. kakamegoes by Cunningham-van Someren & Schifter (1981). Similarly, the clearly isolated population of the Northern Olive Thrush (Turdus olivaceus) might be separable as T. o. porini, differing even from nearby T. o. elgonensis by darker breast and back. Generally the populations of the Northern Olive Thrush in Kenya are certainly different from T. abyssinicus of the Ethiopian highlands. The Blue-shouldered Robin-Chat (Cossypha cyanocampter) also is a West and Central African species reaching its eastern limit of distribution in the North Nandi Forest. The resident birds of the forest have been named C. c. pallidiventris, though this separate population is not generally acknowledged and has been merged recently again with C. c. bartteloti by Fry et al. (1992). The Nandi Forest population of the White-starred Robin (Pogonocichla stellata) may also represent. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectzoology
