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Comparative biology of the burrowing petrels of the Crozet Islands

Notornis, 32 (3), 157-220

P. Jouventin; J.-L. Mougin; J.-C. Stahl; H. Weimerskirch (1985)

Article Type: Paper

This paper presents, as well as some earlier data, the results of a study of the burrowing petrels of the Crozet Islands (South Indian Ocean) made during the East Island expedition of September 1981 to February 1982. The 16 petrels are discussed and analysed in the following taxonomic groups: 4 gadfly petrels, 5 prions, 2 Procellaria petrels, 3 storm petrels and 2 diving petrels. For each group, biometric data and the breeding biology of each species are given. The timing of events (first return to land, laying, hatching, fledging), nest reoccupation, incubation schedule, chick growth and chick-feeding pattern were the main study topics. Abundance cycles during pairing, temporary egg desertions, nest selection, comparison with other localities and particularly ecological segregation of the petrels are discussed.

Henderson Island

Notornis, 32 (1), 83

W.R.P. Bourne; A.C.F. David (1985)

Article Type: Letter




The predators of eggs and chicks of greenfinches in a mixed farming area in Hawke’s Bay

Notornis, 32 (2), 95-100

J.A. McLennan; B.W.H. MacMillan (1985)

Article Type: Paper

Experiments were undertaken to identify the animals responsible for attacks on nests of greenfinches (Carduelis chloris) on a mixed farm in Hawke’s Bay. Nests encased in wiremesh, which excluded all potential predators except mice, suffered no egg losses. Tracking papers placed on wooden poles leading to nests were marked by rats twice. Two ship rats (Rattus rattus) were killed at nests with eggs injected with strychnine. Mustelids destroyed one clutch of eggs and were probably responsible for most of the predations on young. The experiments did not test whether harriers (Circus approximans) or other birds were involved.




A cattle egret

Notornis, 32 (3), 220

P. Child (1985)

Article Type: Short Note