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Habitat use and foraging patterns of a reintroduced population of the South Island saddleback (Philesturnus carunculatus carunculatus), the first breeding season after release

Notornis, 48 (2), 63-71

J.P. Pierre (2001)

Article Type: Paper

The benefits of monitoring habitat use patterns of translocated populations are widely acknowledged. However, this monitoring seldom occurs. Here, I report the habitat use and foraging patterns of a newly translocated population of South Island saddlebacks (Philesturnus carunculatus carunculatus) on Motuara Island, New Zealand, during the 1st breeding season after release. Reintroduced South Island saddlebacks spent most foraging time on the ground and in Pseudopanax arboreus. Foraging substrates used by male and female saddlebacks differed significantly Saddlebacks focused foraging activities at 0-4 m above ground, and appeared to prefer to forage in larger trees, although the species composition of forested areas did not seem to influence the birds’ choices of places to settle. With increasing population density, saddlebacks on Motuara Island may increase their areal foraging eficiency by using a wider range of plant species, vertically stratifying foraging locations within pairs, increasing use of smaller trees for foraging, and possibly by using scrub habitats more extensively South Island saddlebacks appear to be highly adaptable in their choice of foraging sites and this plasticity may enhance the success of translocations.

Rare birds in CSN

Southern Bird, 8 (Dec), 12-12

D. Medway (2001)

Article Type: Article

Atlas update

Southern Bird, 5 (Mar), 8-9

C. Robertson; G. Taylor (2001)

Article Type: article

Decline of brown teal (Anas chlorotis) in Northland, New Zealand, 1988-99

Notornis, 48 (3), 131-136

R. Parrish; M. Williams (2001)

Article Type: Paper

Numbers of brown teal (Anas chlorotis) present at summer flock sites in Northland, New Zealand declined 65% during 1988-99 and the species’ principal range contracted to three enclaves located along 20 km of the eastern coast. Most populations underwent a period of gradual decline followed by an abrupt crash, symptomatic of prolonged recruitment failure. Drought-induced habitat and landscape change is proposed as an important agent of decline in two formerly large populations at Clendon Cove and Tutaematai. Extirpation in Northland appears imminent.

AGM minutes

Southern Bird, 7 (Sep), 10-10

(2001)

Article Type: Article

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.
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