Four species of Pterodroma petrel (P. macroptera, P. cervicalis, P. pycrofti and P. nigripennis) responded strongly to human calls (termed by us the “war-whoop” method). This response was greater in the larger species and included the following behaviour: more frequent calling, movement towards the observer, and fighting. The level of response in P. macroptera was greatest during courtship and incubation and decreased during the chick rearing stage. Our findings support Warham’s (1988) hypothesis that mainly unpaired birds respond to human calls and that the birds associate these sounds with sexual advertisement.
Attempts to re-establish wekas, brown kiwis and red-crowned parakeets in the Waitakere Ranges were made between 1976 and 1986. None appears to have been successful, although wekas did breed at Huia for several seasons.
Please note: This newsletter is a Supplement to Volume 34 (1) of Notornis, not a Supplement to Volume 54 (1) as shown on the cover page. We apologise for this error.
From April 1987 to April 1988 (inclusive) I completed 195 5-min stationary bird counts at two forested sires in the Auckland City Domain. Auckland Domain has 22 species of passerines and near-passerines, more than half of them introduced. The mean annual counts – the first published for the North Island – showed a very high incidence of silvereyes, blackbirds and fantails compared
with beech-podocarp forests and conifer plantations of the northern South Island, and a low incidence of grey warblers and shining cuckoos. Whether these are general characteristics of northern or urban forests awaits further study.
The breeding of the grey-backed storm petrel (Garrodia nereis) at Houruakopara Island in the Chatham Islands (44° 06′ S, 176° 31′ W) was investigated and the nest site, egg, and chick are described. Both parents incubated the egg in poorly synchronised shifts averaging 1.9 days. generally followed by a desertion period of 2.7 days. Eggs hatched from mid-November, and the chick was brooded by either parent for up to 4 days after hatching. Chicks were fed on average every 1.6 days and the size of each feeding increased with age. The average daily increase in body weight was 12.6%, and by 17 days the
weight of the chicks equalled that of the adults. Evidence of competition for nest sites within the species and with broad-billed prions (Pachyptila vittata) and little blue penguins (Eudyptula minor) is discussed and a list of food items taken from regurgitations is presented.