. Bulletin of the British Ornithologists' Club. heard placidus sing, and the experience of other observers has been that it rarely does so. Its call, in the field and in the hand (when mistnetted), is normally a distinctive chatter, which reminded us both of the European Mistle Thrush Turdus viscivorus. Cabanisi is a much noisier bird. Its song is often heard, and is a long, rather monotonous, repititious stream of two notes, rather thrush-like in timbre, with a second bird joining in with a chatter. In the hand it makes an undistinguished squawk, and in the field has a typical bulbul-like thr
. Bulletin of the British Ornithologists' Club. heard placidus sing, and the experience of other observers has been that it rarely does so. Its call, in the field and in the hand (when mistnetted), is normally a distinctive chatter, which reminded us both of the European Mistle Thrush Turdus viscivorus. Cabanisi is a much noisier bird. Its song is often heard, and is a long, rather monotonous, repititious stream of two notes, rather thrush-like in timbre, with a second bird joining in with a chatter. In the hand it makes an undistinguished squawk, and in the field has a typical bulbul-like three note call, often preceded by a chatter. Only rarely have we heard it make the Mistle Thrush chatter of placidus. Stjernstedt has tape recordings of the calls of both species and the song of cabanisi, which he has kindly discussed with me. CONCLUSIONS In north-eastern Zambia, where P. cabanisi and placidus most closely approach each other geographically, there are considerable differences in colour and size, though not of bill length nor tail: wing ratio. There are apparently consistent differences in bill shape and wing formulae, and also in. D D Specimens examined O by other authorities Map showing specimens of Phyllastrephus examined and probable distribution of each species. 136. 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 British Ornithologists' Club. London : British Ornithologists' Club
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