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Nest materials of skuas (Catharacta spp.) and kelp gulls (Larus dominicanus) at Cierva Point, Antarctic Peninsula

Notornis, 48 (4), 235-240

R.D. Quintana; V. Cirelli; O. Benitez (2001)

Article Type: Paper

Use of nest materials for skuas (Catharacta spp.) and kelp gull (Larus dominicanus) was studied in the Antarctic Peninsula during the 1992-1993 breeding season. Material from 126 skua and 51 gull nests found in 10 habitat types (HTs) was analyzed. Plant censuses were conducted to evaluate the availability of species commonly used as nesting material. Skuas used mainly Polytrichum alpestre, while gulls used mainly Deschampsia antarctica. No correlation was found in the use of different nest material in skuas and gulls, indicating that they differ in their use. The narrow range of resources found in nest material suggests a selective pattern of use restricted to a few plant species. However, use of nesting material also appears linked to its availability, although skuas and gulls’ preference for P. alpestre and D. antarctica, respectively was observed in HTs with a low and discontinuous covering of these plant species.

Counting terrestrial bird species in mixed habitats: an assessment of relative conspicuousness

Notornis, 48 (1), 47-53

B. McKinlay (2001)

Article Type:

Conspicuousness of terrestrial birds from a distribution study using 100 ha squares based on the New Zealand map grid was investigated. Logistic regression was used to determine the amount of time observers should spend in each square to have a 50% chance of detecting any given bird species if it was present. The analysis was conducted for 3 habitats. For 14 species of native and introduced birds, the length of time necessary to determine presence was 1 – 631 min. To ensure that most species are accounted for in future distribution studies using similar grids, it is recommended that observers spend 1 h in each square.

Atlas update

Southern Bird, 8 (Dec), 6-7

C. Robertson; G. Taylor (2001)

Article Type: article

Courting Terns

Southern Bird, 6 (Jun), 3-3

H. Clifford (2001)

Article Type: Article

A fossil vertebrate fauna accumulated by laughing owls (Sceloglaux albifacies) on the Gouland Downs, northwest Nelson, South Island

Notornis, 48 (4), 225-233

T.H. Worthy (2001)

Article Type: Paper

A rich fossil fauna accumulated by laughing owls (Sceloglaux albifacies) during the Holocene, is described from GD101 Cave, on the Gouland Downs, northwest Nelson, South Island, New Zealand. Twenty-eight species of bird, a tuatara, 3 frogs, at least 4 geckos, 1 skink, 2 bats, and 2 fish contribute to the species diversity. The fauna includes the first inland fossil record of New Zealand dotterel (Charadrius obscurus). The taphonomy of the deposit and the diet of the owl are discussed.
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