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Observations on the chick-rearing strategy of yellow-eyed penguins (Megadyptes antipodes) on Otago Peninsula, New Zealand

Notornis, 47 (3), 141-147

K. Schuster; J.T. Darby (2000)

Article Type: Paper

The chick-rearing strategy of yellow-eyed penguins (Megadyptes antipodes) breeding on Otago Peninsula was examined in 12 pairs of adults, between 17 November 1996 and 31 March 1997, from time of hatching of chicks to parental moult. Differences in behaviour of both male and female parents towards one- or two-chick broods were not statistically significant, but behaviour towards all offspring changed significantly over time with respect to breeding phases. Differences observed resulted from a change in feeding procedure. “Food-walks” started significantly earlier in the course of a feeding session as time progressed, while major components (duration and number of individual feeds) decreased significantly. The changes observed are interpreted as resulting from the chicks’ growing independence in concert with the parents’ decreasing urge to spend time with their offspring outside the still necessary feeding encounters. An evolutionarily stable environment and reliable food source are suggested as the reason for the lack of development of different chick-rearing strategies for different numbers of offspring or for male and female breeders.









Age- and sex-related differences in head feather patterns of black stilts (Himantopus novaezelandiae)

Notornis, 47 (3), 127-130

S.P. Elkington; R.F. Maloney (2000)

Article Type: Paper

Patterns of white feathers on the heads of 10 female and 18 male wild and captive adult black stilts (Himantopus novaezelandiae) were quantified to determine whether the presence and location of white flecking was age- or sex-related. Eleven of the males, but none of the females had white flecking on their heads. Flecking occurred on 2-7 of 9 head regions described and an increased amount of flecking was positively correlated with increasing age. Males without white flecks were 2-7 years old, whereas males with flecks were aged 5-19 years. Most flecking was around the eyes, in the superciliary region and on the crown. We conclude that the presence of white flecking around the eyes or generally scattered on the head is a reliable indicator of a black stilt being old and male.

AGM minutes

Southern Bird, 3 (Sep), 3-3

C. Reed (2000)

Article Type: article



Rare birds

Southern Bird, 4 (Dec), 8-9

(2000)

Article Type: article



Status of the Westland petrel (Procellaria westlandica) off South America

Notornis, 47 (4), 179-183

E.S. Brinkley; S.N.G. Howell; M.P. Force; L.B. Spear; D.C. Ainley (2000)

Article Type: Paper

The presence of small numbers of Westland petrels (Procellaria westlandica) off the east and west coasts of South America is a relatively recent discovery. Evidence for the presence of the species in those seas has, however, been found to extend back at least as far as 1913, with the re-identification of a specimen in the American Museum of Natural History collection as P. westlandica. Preliminary comments are given on the condition of plumage of Westland petrels observed in South American waters.

Otago Grebes

Southern Bird, 3 (Sep), 7-7

G. Chance (2000)

Article Type: article



Rare birds report

Southern Bird, 2 (Jun), 8-8

D. Medway (2000)

Article Type: article


Recent literature

Notornis, 47 (1), 54-54

M.J. Imber (2000)

Article Type: Book Review