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Buller’s mollymawks breeding at the Three Kings Islands

Notornis, 31 (3), 203-207

A.E. Wright (1984)

Article Type: Paper

A small breeding colony of northern Buller’s mollymawks (Diomedea bulleri platei Reichenow, 1898) is recorded from the Three Kings Islands off northern New Zealand. The subspecies was previously known to breed only at the Chatham Islands, which lie 10 degrees of latitude south of the Three Kings.

Breeding success of isolated pairs of Caspian terns in Canterbury

Notornis, 31 (3), 185-190

R.J. Pierce (1984)

Article Type: Paper

In Canterbury, Caspian terns (Hydroprogne caspia) nest mainly as single pairs associated with colonies of black-backed gulls (Larus dominicanus) on shingle riverbeds. Of 37 nests studied, 28 (75%) hatched and 20 (54%) produced a total of 21 flying young, each pair raising an average of 0.6 young per season. The low productivity is attributed to reduced prey availability.

A census of the South Polar skua at Cape Hallett, Antarctica

Notornis, 31 (4), 312-319

J.G. Pascoe (1984)

Article Type: Paper

Two counts of skuas (Catharacta maccormicki) at Cape Hallett were made between 17 and 20 January 1983: in one 85 pairs and 83 non-breeding birds, total 253 birds; in the other, 83 pairs and 79 non-breeding birds, total 245 birds. South Polar skua numbers remain low, suggesting a continuation of the 1960s decline or the influence of climatic factors such as heavy snowfall during critical stages of skua breeding.

The weka on Macquarie Island

Notornis, 31 (2), 145-154

N.P. Brothers; I.J. Skira (1984)

Article Type: Paper

Wekas have been on Macquarie Island for just over 100 years. They occur in the coastal tussock grassland, mainly in the northern half of Macquarie Island. Males are larger than females and the sexes can be separated on a combination of culmen and tarsus lengths. The sex ratio in favour of males was considered to be due to behavioural differences. Breeding begins in August and, although four eggs may be laid, only one or two chicks are usually reared. Losses are probably due to predation by feral cats and skuas. Preferred foods are vegetation, insects and spiders. Mammal and bird remains were present in fewer than half the gizzards examined, but rats and mice are thought to be important food because of their size.

The effects of logging on winter bird populations near Karamea

Notornis, 30 (3), 187-197

D. Onley (1983)

Article Type: Paper

Winter 5-minute bird counts in unlogged and logged native forest near Karamea showed substantial declines in native forest species after logging and a varied response from introduced species.
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