. Bulletin of the British Ornithologists' Club. {Bull. i979: 99(3)] 96 Bycanistes brevis Silvery-cheekedHornbill. In the Nyikamwaka area (io° 10' S, 330 28' E) at least 2 were well seen on (T- O. Osborne). In Dec 1976 birds were seen in the Mafinga Mountains and on the Zambian side of the Nyika Plateau by D. R. Aspinwall. The status of this unmistakeable bird is uncertain, but it appeared to be absent from the Nyika in Dec 1975 and 1977 (R. J. Dowsett & F. Lemaire). With the exception of a single sight record from the Malawi side of the Nyika in Oct 1973 (Dowsett 1974),
. Bulletin of the British Ornithologists' Club. {Bull. i979: 99(3)] 96 Bycanistes brevis Silvery-cheekedHornbill. In the Nyikamwaka area (io° 10' S, 330 28' E) at least 2 were well seen on (T- O. Osborne). In Dec 1976 birds were seen in the Mafinga Mountains and on the Zambian side of the Nyika Plateau by D. R. Aspinwall. The status of this unmistakeable bird is uncertain, but it appeared to be absent from the Nyika in Dec 1975 and 1977 (R. J. Dowsett & F. Lemaire). With the exception of a single sight record from the Malawi side of the Nyika in Oct 1973 (Dowsett 1974), numerous dry season visits to this area by many observers have produced no other reports. Lybius lacrymosus Spotted-flankedBarbet. Two were seen at Kawimbe in Mbala District (8° 50' S, 310 32' E) on (R. Stjernstedt). Subsequently this species has been found locally not uncommon further south in the Chambeshi River valley to Mbesuma, at about io° S (D. R. Aspinwall, R. J. Dowsett, et a/.). A specimen that I collected at Mbesuma was kindly examined by M. P. Stuart Irwin, who allocated it to the race ruahae. This barbet is clearly resident in northern Zambia. The map in Fig. 1 is taken from the provisional draft of An Atlas of the Birds of Zambia (Dowsett in prep.), and shows the. Figure i distribution of lacrymosus in relation to the other two barbets of the subgenus Tricholaema that are known from Zambia (the report of T. hirsutum near Lusaka by Ulfstrand & Alcrstam (1977) being based on a misidentification). It is clear that lacrymosus and frontatus have a wide geographical overlap, but they appear to be segregated ecologically (though they may occur within sight or sound of each other). Whereas lacrymosus occurs in evergreen thicket on termite hills in otherwise ^4^c/^-dominated areas, frontatus is a bird of deciduous miombo woodland. The possibility of hybridisation in areas of overlap cannot be ruled out, although it is likely that hybridisation between fr
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