. Bulletin of the British Ornithologists' Club. Vol. 88 Bulletin We are most grateful to Dr. James Harrison, Dr. Luc Hoffman and Mr. Alan Johnson for their advice with this note. Reference: Blondel, J., (1965). Le Heron cendre, Ardea cinerea L., nicheur en Camargue. L'Oiseau 35: 59-60. The tracheae of hybrid Anatidae by J. V. Beer Received 27th September, 1967 Gray (1958) has listed some 400 inter-specific, inter-generic and even inter- tribal hybrids in the Anatidae, many of which show a remarkable degree of fertility, a characteristic of this family (Johnsgard, 1960a). Their plu- mage
. Bulletin of the British Ornithologists' Club. Vol. 88 Bulletin We are most grateful to Dr. James Harrison, Dr. Luc Hoffman and Mr. Alan Johnson for their advice with this note. Reference: Blondel, J., (1965). Le Heron cendre, Ardea cinerea L., nicheur en Camargue. L'Oiseau 35: 59-60. The tracheae of hybrid Anatidae by J. V. Beer Received 27th September, 1967 Gray (1958) has listed some 400 inter-specific, inter-generic and even inter- tribal hybrids in the Anatidae, many of which show a remarkable degree of fertility, a characteristic of this family (Johnsgard, 1960a). Their plu- mage is usually intermediate between that of the parent species but hybrids may also show novel characters or sometimes resemble other species (Harrison, 1953; Harrison & Harrison, 1963; Gillham, Harrison & Harri- son 1966; Sage, 1966). The behaviour of hybrids shows a comparable pattern and Sharpe & Johnsgard (1966) consider that both plumage and behavioural characters are under the control of relatively few genes. These features have both evolutionary and taxonomic significance. The structure of the tracheae of the Anatidae is a valuable taxonomic character (Johnsgard, 1961a) and, despite their diverse form, only one brief comment, in a paper by Harrison (1964), has been found on a trachea from a hybrid. Hybrid tracheae have been obtained from post-mortem material examined at the Wildfowl Trust, Slimbridge, Gloucestershire, and from material supplied by Mr. J. Hall. Dr. J. M. Harrison loaned several speci- mens from his museum collection of A. platyrhynchos A. flavirostris Hybrid A, castanea Fig. 1. Syringes of hybrid Anatini—Mallard and teal forms. Ventral view x f. 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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