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The Little Barrier Island snipe

Notornis, 35 (4), 273-281

Miskelly, C.M. (1988)

Article Type: Paper

A single snipe was captured on Little Barrier Island in 1870. The history of this specimen is traced up to its designation as the holotype of Coenocorypha aucklandica barrierensis 85 years later. Other records of snipe in the Auckland area seem to refer to the one Little Barrier specimen or to other species of wader. Snipe apparently disappeared from Little Barrier Island in the 1870s, when cats became established, but apparently were rare before then. References by R.H. Shakespear to “snipe” on Little Barrier Island are given, but are regarded as probably referring to other species.

Moults of rectrices and body plumage of Blue-eyed and King shags (Phalacrocorax atriceps and P. albiventer) and phenology of moults

Notornis, 35 (2), 129-142

P.C. Rasmussen (1988)

Article Type: Paper

In Blue-eyed and King shags (Phalacrocorax atriceps and P. albiventer), moult of the rectrices is irregular but not random. R1 (Rectrix 1) was usually the first to be replaced in sub-adult Blue-eyed shags but not in adults. In Blue-eyed shags, moulting rectrices were most often separated by one or two non-moulting rectrices. When two adjacent rectrices were moulting in adult Blue-eyed shags, one was usually over half grown before the other began moulting, or both were about the same length or missing. Up to six rectrices moult simultaneously in sub-adults and up to eight in adults. Moult of rectrices is usually not symmetrical in Blue-eyed shags. In adults, the number of moulting feathers and the number of waves are correlated among flight feathers. In flight feathers of sub-adults, the number of moulting feathers is not correlated but the number of moulting waves and the number of retained juvenile flight feathers are correlated. Most moult of flight and body feathers takes place after breeding, but a limited amount occurs during breeding and in winter.

Some characteristics of red-crowned parakeets on the Poor Knights Islands

Notornis, 35 (1), 1-8

Sagar, P.M. (1988)

Article Type: Paper

Measurements, plumage and moult of Red-crowned Parakeets (Cyanoramphus novaezelandiae novaezelandiae) were recorded during a banding study on Aorangi Island, Poor Knights Islands, between 1978 and 1986. Males were significantly larger than females in all measurements and in weight. Weight varied throughout the year and was highest in May and lowest in November. The weights of males was significantly less during October and November than at other times of the year, but there were no significant variations in the weight of females. More males than females were caught, and recaptures suggested that females had a lower survival rate than males. Two of the 329 parakeets banded had plumage characteristics of Red-crowned x Yellow-crowned Parakeet (Cyanoramphus auriceps auriceps) hybrids. Casual observations indicated that the breeding season extended from late October to January. Most birds were in active moult by late February.

Breeding of the banded dotterel, Charadrius bicinctus, on the Cass River Delta, Canterbury

Notornis, 35 (1), 9-14

Bomford, M. (1988)

Article Type: Paper

Laying began in August, peaked in late September to early October and finished in December. Eggs were laid at intervals of three days to a normal clutch of three. The site and dimensions of 47 nests are described. The female did 82% of daytime incubating, and incubation averaged 26.5 days. Most eggs were lost to predators and only 44% hatched. In fine weather chicks made trips away from the nest within a few hours of hatching. Once hatching was completed the nest was deserted, but parents and chicks stayed in the territory until the chicks fledged at 5-6 weeks. Post-breeding flocks contained 23% juveniles.

Kiwis and dog predation: observations in Waitangi State Forest

Notornis, 35 (3), 197-202

Taborsky, M. (1988)

Article Type: Paper

A wild dog was found to kill 13 out of 23 kiwis marked with transmitters. The whole population may have lost 500 out of 900 birds, although this estimate may be conservative. The population will probably need 10-20 years and a rigorous protection scheme to recover to previous densities.

Foraging by Adelie Penguins during the incubation period

Notornis, 35 (1), 15-23

Davis, L.S., Ward, G.D., Sadleir, R.M.F.S. (1988)

Article Type: Paper

Nine Adelie Penguins (Pygoscelis adeliae), 4 females and 5 males, were tracked by radio telemetry when they went to sea from the Northern Rookery, Cape Bird, Antarctica, on their first foraging trips of the incubation period. Each penguin took a different direction on leaving the rookery but maintained its approximate heading, suggesting that it was navigating. Radio contact was lost after 2-12 days as birds moved beyond the 100 km radio horizon. The penguins spent about one-third of their time on ice floes. Most of their time in the water was spent diving and feeding. Dives (including underwater swimming) lasted for a mean of 92.5 s , followed by a mean recovery period of 33.8 s. The length of the recovery period was significantly correlated with the length of the dive. From the maximum dive times, the duration of “feeding” dives, and the dive: pause ratios, Adelie Penguins seem to have diving abilities between those of the other two pygoscelid penguins, the Gentoo and Chinstrap. We hypothesize that the Adelie Penguins may travel large distances from the rookery during the incubation period so as to forage on the larger and more pelagic krill, Euphausia superba.
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