Golden Eagle (Aquila chrysaetos) Science Article 2 abstract The diet of young Golden Eagles Aquila chrysaetos in Corsica (Western Mediterranean) has been studied by identifying remains and pellets collected at nests after fledging from 1991 to 1996. Ten mammalian species, 17 birds and two reptiles have been identified, of which snakes, Bovidae (mostly Feral Goat […]
Fat reserves and moult-migration overlap in goldcrests, Regulus regulus-A trade-off?
Goldcrest (Regulus regulus) Science Article 1 abstract Moult and migration are both recognised as highly energy-demanding activities of birds. I studied moult-migration overlap in migrating goldcrests Regulus regulus to see whether birds might be trading these activities off against each other. I found that in both sexes the size of subcutaneous fat reserves were greater […]
NOTES ON THE LIFE HISTORY OF AMAZZLZA FZMBRZATAIN SURINAM
Glittering-throated Emerald (Polyerata fimbriata) Science Article 1 abstract L ESSON’S Emerald is a medium-sized hummingbird with a rounded tail Above it is bronze-green, darker on the head and tail, brighter and more glittering on the under surface. The bill is almost straight. Three males that I collected in Surinam weighed 4.5, 4.8, and 5.8 grams; […]
Fuelling rates of garganey ( Anas querquedula) stagingin the Camargue, southern France, during spring migration
Garganey (Anas querquedula) Science Article 1 abstract Most species of long-distance migratory birds put on energy stores to fuel their travels. However, recent studies have highlighted the potential costs associated with carrying too much fuel, either through increased predation risk or decreased .ight e.ciency. Consequently, it is now widely accepted that migratory birds should carry […]
Garden WarblerSylvia borinmigration in sub-SaharanWest Africa: phenology and body mass changes
Garden Warbler (Sylvia borin) Science Article 3 abstract The Garden Warbler is a classic subject for the study of Palaearctic
The study of bird migration across the WesternSahara; a contribution with sound luring
Garden Warbler (Sylvia borin) Science Article 2 abstract During spring and autumn migration 2003, the Swiss Ornithological Institute set up a concerted project in Mauritania to study bird migration across the Sahara. I participated with a side project using artificial induction of landfall with sound luring in an attempt to overcome the potential problem of […]
Changes in body condition from spring migration to reproduction in the Garden Warbler Sylvia borin : a comparison of a lowland and a mountain population
Garden Warbler (Sylvia borin) Science Article 1 abstract Long-distance migrants often arrive on their breeding grounds with large fat stores . Two expl anations for this phenomenon are (1) that large fat stores at arrival are needed to speed up the breeding schedule and to counteract possible time constraints, and (2) that they are used […]
Evolution ih the Breeding Habits of the Fulvous Tree Duck.
Fulvous Tree-Duck (Dendrocygna bicolor) Science Article 1 abstract Mr. Wanzer states that Dendrocygna fulva was first brought to his notice in June 1895, and that they have returned each subsequent season, arriving about the first of June, and that they did not seem to increase until about 1898, but since that time have increased withsuch […]
Sex discrimination and measurement bias in Northern Fulmars Fulmarus glacialis from the Canadian Arctic
Fulmar (Fulmarus glacialis) Science Article 1 abstract The Northern Fulmar Fulmarus glacialis is a seabird in which both sexes have similar plumage, but sexual dimorphism in body size is apparent. We used data from 63 Northern Fulmars collected at Cape Vera, Nunavut, Canada, to develop a discriminant function to predict sex that is based on […]
Noordse stormvogel en zwerfvuil
Fulmar (Fulmarus glacialis) Science Article 2 abstract Tussen 1982 en 2001 bleek steeds meer plastic (zwerfvuil) voor te komen in de magen van Noordse stormvogels. Vooral gebruiksplastic nam in het eind jaren negentig zeer sterk toe, waarna zich een afname heeft ingezet (significant over periode 1996-2003). De hoeveelheid industrieel plastic is tussen 1982 en 2003 […]