Publications Archive

Basic information on the distribution of members of the genus Haematopus is reviewed and the taxonomy of the group is discussed. The distinctions between species and subspecies are stressed and applied to the classification of oystercatchers; alternative taxonomic rank is suggested for some forms, but the ideas require testing in the field.

The distribution and abundance of the sea bird species seen during a cruise between New Zealand and the Bounty Islands in December 1970 are described. The field characters of white-capped mollymawk and Salvin’s mollymawk are discussed. Cape pigeons and Salvin’s mollymawks were very abundant around their breeding site on the Bounty Islands, but were scarce elsewhere white-capped mollymawks were numerous on the Pukaki Rise. White-chinned petrels were common towards the southern end of the study area (lat. 50° S). The white feathering at the base of the mandible could not be seen in these birds in the field. The Subtropical Convergence, which occurred about lat. 44° S, was a definite southern boundary of the distribution of Buller’s shearwater and the flesh-footed shearwater.

Observations on seabirds in Tongan waters during 18 voyages over a two year period are detailed. Of particular interest are records of the giant petrel, black-winged petrel, Herald petrel, and Audubon’s shearwater and illustrations are given of specimens of the two latter species.

A survey of the Wairarapa river system to discover the population and distribution of the black-fronted dotterel (Charadrius melanops) was carried out by Wellington and Wairarapa members of the OSNZ during November-December 1972. Further observations up to July 1973 are included. A total of 78 birds, mainly in pairs, was found. Their distribution is widespread, reflecting closely the distribution of their favoured habitat in the Wairarapa. Winter distribution is very similar, with many birds remaining in pairs but with some flocking in favoured feeding places. Their habitat, breeding and possible competition with banded dotterels (C. bicinctus) are briefly discussed in the hope of encouraging further study. Juvenile plumage is described. Known records of earlier sightings are given.

The first record of a gentoo penguin, a female found on St Kilda Beach, Otago, on 22 September 1970, is documented.