Carrion Crow (Corvus corone corone) Science Article 2 abstract The Carrion Crow (Corvus corone corone) and the Hooded Crow (C. corone cornix) have parapatric ranges in Europe with narrow areas of hybridization. Reproductive biology of populations of Carrion and Hooded crows and hybrids is described for four areas in northern Italy. Nonrandom mating was observed […]
BEHAVIOR OF WHISTLING AND CAPPED HERONS IN THE SEASONAL SAVANNAS OF VENEZUELA AND ARGENTINA
Capped Heron (Pilherodius pileatus) Science Article 1 abstract Behavior, habitat use, and foraging of the Whistling Heron (Syrigma sibilatrix)a nd Capped Heron (Pilherodiusp ileatus)w ere studied in Venezuela and Argentina. Both foraged primarily alone or in pairs, but Whistling Herons also fed and roosted socially. Whistling Herons nested solitarily, maintained post-fledging associations with young, and […]
Habitat features of the capercaillie (Tetrao urogallus) leks in the West Carpathians
Capercaillie (Tetrao urogallus) Science Article 4 abstract Habitat characteristics of 43 capercaillie (Tetrao urogallus) leks were studied in the mountains of Central Slovakia (West Carpathians) in 1984-2002. Macro-habitat was described with respect to topography and succession stage. Micro-habitat was described with respect to forest type and forest stand structure. Twenty-seven out of forty-three display grounds […]
Phylogeography of the European capercaillie (Tetrao urogallus ) and its implications for conservation
Capercaillie (Tetrao urogallus) Science Article 11 abstract The phylogeographic pattern of mitochondrial DNA variation in capercaillie (Tetrao urogallus) from 14 populations across the European range was examined using sequence variation in the central portion of the control region and the cytochrome B gene. Twenty-nine different haplotypes were resolved, which formed two distinct phylogenetic clades. The […]
Spacing of adult and subadult male Common Capercaillie during the breeding season
Capercaillie (Tetrao urogallus) Science Article 2 abstract The spacing behavior of 58 male Common Capercaillie (Tetrao urogaIlus) was studied at Varaldskogen in southeast Norway during 1979-1985. Birds captured at leks were equipped with radio-transmitters, and their movements were monitored throughout the year. During spring, males 4 yr old and older occupied exclusive day territories of […]
Intestinal parasites in the Cantabrian Capercaillie, Tetrao urogallus cantabricus: a coprological study.
Capercaillie (Tetrao urogallus) Science Article 8 abstract The intestinal parasites of the Cantabrian Capercaillie were Estudied by counting the eggs of parasitic species found in 154 f cal samples from 34 localities in the Cantabrian mountains. Prevalence was 58% for Eimeria sp. and 25% for Capillaria sp.; however, both intensity and mean intensity of these […]
Social interactions among Capercaillie Tetrao urogallus males outside the lek during spring
Capercaillie (Tetrao urogallus) Science Article 12 abstract Capercaillies have a lek-likemating system,with partly overlappingmale daytime ranges extending radially out fromsmaller display territories at the lek.With VHF telemetry, we studied the spatial interactions among neighbouring adult males (n = 10) of different social status in their overlap zones outside the lek. In addition, we recorded responses […]
Minimum viable population size of capercaillie Tetrao urogallus: results from a stochastic model
Capercaillie (Tetrao urogallus) Science Article 1 abstract In order to estimate minimum area requirements for viable isolated populations of capercaillie Tetrao urogallus in Central Europe, we developed a stochastic population model. Model parameters were largely based on the results of a field study in the Bavarian Alps. Environmental fluctuations (amount of rainfall in June and […]
Lack of genetic structuring and subspecies differentiation in the Capercaillie, Tetrao urogallus, in Finland
Capercaillie (Tetrao urogallus) Science Article 6 abstract We sequenced and analysed variation in a 430 bp segment of the mitochondrial DNA control region of 302 Finnish capercaillies Tetrao urogallus. The data were divided into four zones representing the three suggested subspecies (T. u. urogallus, T. u. uralensis/karelicus, T. u. major), and the zone for hybrids […]
Ecology of the capercaillie (Tetrao urogallus) and forest management in relation to its protection in the West Carpathians
Capercaillie (Tetrao urogallus) Science Article 5 abstract Ecology of capercaillie (Tetrao urogallus) was studied in the mountains of Central Slovakia (West Carpathians) in 1981-2003. In the studied area, the capercaillie population inhabited especially old natural forests (100-250 years old) in the spruce-beech-fir (850-1,270 m a.s.l.) and spruce (1,250-1,530 m a.s.l.) vegetation zones. The overstorey stand […]