Age at first breeding and fitness in goshawk Accipiter gentilis

How, and Why, Is the Goshawk (accipiter Gentilis) Affected by Modern Forest Management in Fennoscandia?

-•The Northern Goshawk (Accipiter gentilis) is a common raptor in the boreal forest of Fennoscandia (Norway, Sweden and Finland), with a present breeding density of about 3 pr/100 km 2 of forest area. Several independent studies show that goshawk populations in Fennoscandia have declined by 50-60% from the 1950s to the 1980s. This decline coincides in time with an intensification of forest mana...

Evaluation of the Health Status of Goshawk Chicks (accipiter Gentilis) Nesting in Wrocław Vicinity

The health status of goshawk chicks (Accipiter gentilis) from the nests in the vicinity of Wrocław was evaluated. The research was conducted in spring 2001. Each nest was inspected three times at different phases of the reproduction period and the protocol included: the counting of eggs in each nest, clinical examination of chicks, collecting swabs from the crop and cloaca, blood and litter sam...

A Sarcocystis Species from Goshawk (Accipiter gentilis) with Great Tit (Parus major) as Intermediate Host

Dne hundred and seventy five passerine birds from the Czech Republic were examined for the presence of sarcosporidia; auly 5 (all great tits) were positive for muscle cysts. Three great tits experimentally fed sporocysts (12.2 x 8.4, 11-13x 7.5-9 !lm) from a goshawk developed cysts while 2 house sparrows (Passer domesticus) were not infected. The cysts from great tits muscles were morphological...

Effects of Prey Abundance on Breeding Season Diet of Northern Goshawks (Accipiter gentilis) Within an Unusual Prey Landscape

—A critical element of diet analysis is species adaptability to alternative prey sources. The breeding-season diet of Northern Goshawks (Accipiter gentilis) includes both mammalian and avian species, varies geographically, and is often dependent upon tree squirrels of the genera Sciurus and Tamiasciurus. We studied alternative prey sources of Northern Goshawks in the South Hills of south-centra...

Environmental contaminants in organs of free-ranging northern goshawks (Accipiter gentilis) from three regions of Germany