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Nesting Behaviour of the Black-Casqued Hornbill Ceratogymna atrata (Temm.) and the Great Hornbill Buceros bicornis L.
Ornis Scandinavica (Scandinavian Journal of Ornithology)
Vol. 1, No. 1 (1970), pp. 11-15
Stable URL: http://www.jstor.org/stable/3676330
Page Count: 5
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A pair of Black-casqued Hornbills and a pair of Great Hornbills in captivity closed their nest-hole in the same way, both mates plastering up the hole, so that only a slit was left. The female worked from the inside, and the male from the outside. The female did most of the work. The material was brought to her by the male. When building, the birds kept the material in the tip of their bill, and made rapid sideways vibrating movements of their bills.
Ornis Scandinavica (Scandinavian Journal of Ornithology) © 1970 Nordic Society Oikos