Greylag Goose (Anser anser) Science Article 7 abstract Egg predation in Greylag Geese Anser anser nesting in reedbeds was studied at three sites in Vejlerne (NW Denmark). Overall, 34% of all clutches hatched successfully (range 26-53%), while at least 34% of all nests were abandoned. Avian predation of clutches was particularly high on one site […]
Greylag geese (Anser anser)-Scirpus maritimus relationships in a newly colonised wintering area in the Camargue
Greylag Goose (Anser anser) Science Article 10 abstract In order to evaluate the proportion of Scirpus maritimus tubers consumed by a growing population of wintering Greylag goose (Anser anser) in Camargue, Southern France, we (1) measured the biomass of Scirpus maritimus tubers on the main resting and feeding marsh for geese in the area; and […]
On the spatial-distribution and social-organization of neck-banded Greylag Geese Anser anser in their breeding area of Lake Neusiedl, Austria
Greylag Goose (Anser anser) Science Article 5 abstract Although goslings are known to move up to 10 km in their first days of life, juvenile geese only moved short distances (up to 1 km) from their ringing sites after ringing. In July the geese gathered in the central Seewinkel area (main gathering place Lange Lacke). […]
Breeding biology of the grey-faced buzzard (butastur indicus) in northeastern china
Grey-faced Buzzard (Butastur indicus) Science Article 1 abstract We studied the breeding biology of the Grey-faced Buzzard (Butastur indicus) in Zuojia Nature Reserve, linlin province, China from 1996-98. Grey-faced Buzzards are summer residents in northeastern China. Nesting sites were occupied in March and annual reoccupancy was 60%. Grey-faced Buzzards built new or repaired old nests […]
A tangled tale of two teal: population history of the grey Anas gracilis and chestnut teal A. castanea of Australia
Grey Teal (Anas gracilis) Science Article 2 abstract Two Australian species of teal (Anseriformes: Anatidae: Anas), the grey teal Anas gracilis and the chestnut teal A. castanea, are remarkable for the zero or near-zero divergence recorded between them in earlier surveys of mitochondrial DNA (mtDNA) diversity. We confirmed this result through wider geographical and population […]
Movements of a nomadic waterfowl, Grey Teal Anas gracilis, across inland Australia ? results from satellite telemetry spanning fifteen months
Grey Teal (Anas gracilis) Science Article 1 abstract We used lightweight satellite transmitters to follow the movements of 17 Grey Teal Anas gracilis between September 2003 and November 2004 in two contrasting landscapes, the agricultural districts of southern Australia and the desert landscapes of the interior. Roshier D.A., Klomp N.I. and Asmus M., Ardea 94(3): […]
Origin and movements of Grey Plovers Pluvialis squatarolaringed in Germany
Grey Plover (Pluvialis squatarola) Science Article 3 abstract The general migration routes of waders using the East Atlantic flyway are reasonably wellknown. However, detailed studies on the migration routes and the origin of Grey Ploversstaging along the German coasts are very limited. Klaus-Michael Exo & Svea Wahls, Wader Study Group Bull. 81: 42-45. 1996 Download […]
Moult, mass and migration of Grey Plovers Pluvialis squatarola wintering in South Africa.
Grey Plover (Pluvialis squatarola) Science Article 2 abstract Data on 355 Grey Plovers Pluvialis squatarola trapped in South Africa in 1971-1997 were used to describe seasonal body mass variation and moult in relation to their very long migrations. The estimated duration of adult primary moult, 131 days, was similar to that observed in India and […]
The regulation of primary molt speed in the grey plover,Pluvialis squatarola
Grey Plover (Pluvialis squatarola) Science Article 1 abstract Grey plovers wintering at different latitudes differ in duration of molt. We investigated the role of simultaneous primaryshedding and different growth rates of individual primaries on regulation of molt speed. We also explored relationships betweenlength and mass of primaries and primary growth rates. Grey plovers adjusted molt […]
Rejection of artificial parasite eggs by gray kingbirds in the bahamas
Grey Kingbird (Tyrannus dominicensis) Science Article 1 abstract We added artificial Shiny Cowbird (Molothrus bonariensis) eggs to Gray Kingbird (Tyrannus dominicensis) nests in the Bahamas, where Shiny Cowbirds were first recorded in 1993. Gray Kingbirds ejected 85% of artificial eggs within 48 hr of addition. Based upon the short time of contact between the two […]