Twite (Carduelis flavirostris) Science Article 1 abstract Following a recent large decline in range and numbers, the Twite Carduelis flavirostris is a red-listed bird of conservation concern. An understanding of the species’ movements between wintering and breeding areas is essential to underpin effective conservation. The migration patterns of two populations of Twite were examined: those […]
Category: Eurasia
Natal philopatry and local movement patterns of Twite Carduelis flavirostris
Twite (Carduelis flavirostris) Science Article 2 abstract The Twite Carduelis flavirostris is classified as a red-listed bird of conservation concern in the United Kingdom. Successful conservation initiatives will depend on an understanding of local movement patterns and natal philopatry as these will be important in determining how likely the species is to colonise new nesting […]
DIVING BEHAVIOUR AND HEART RATE IN TUFTED DUCKS (AYTHYA FULIGULA)
Tufted Duck (Aythya fuligula) Science Article 2 abstract Diving behaviour and heart rate were monitored in tufted ducks diving under circumstances which simulated various environmental conditions such as feeding under ice in winter R. STEPHENSON et al., J. exp. Biol. 126, 341-359 (1986) Download article download full text (pdf)
Food intake rates and habitat segregation of Tufted Duck Aythya fuligula and Scaup Aythya marila exploiting Zebra Mussels Dreissena polymorpha.
Tufted Duck (Aythya fuligula) Science Article 1 abstract The foraging skills of Tufted Duck Aythya fuligula and Scaup Aythya marila feeding on Zebra Mussels Dreissena polymorpha were studied in experiments under semi-natural diving conditions with relevance to the IJsselmeer/Markermeer area (large lakes in the centre of The Netherlands, former Zuiderzee area), the major freshwater wintering […]
Nightjar Caprimulgus europaeus and Woodlark Lullula arborea – recovering species in Britain?
Tree Pipit (Anthus trivialis) Science Article 2 abstract The Nightjar Caprimulgus europaeus and Woodlark Lullula arborea are identified as species of conservation concern at both a UK and a European level on account of historical declines in their population sizes and ranges. The UK populations of both species have increased significantly in recent decades and […]
Fitness consequences of hybridization between house sparrows( Passer domesticus) and tree sparrows ( P. montanus)
Tree Sparrow (Passer montanus) Science Article 2 abstract Gene transfer may occur following hybridization between closely related species if hybrids are viable and able to breed with individuals of one or both of the parental species. House (Passer domesticus) and tree sparrows (P. montanus) occasionally hybridize and produce viable o.spring. Previously, we concluded that male […]
Reproductive effort of colonialand solitary breeding tree sparrows Passer montanus L.
Tree Sparrow (Passer montanus) Science Article 1 abstract A total of 250 nestboxes were arranged in five plots in a suburban area of Budapest, Hungary (19 deg 04’E, 47 deg 41’N). In each plot, 25 were placed at 50 m intervals to simulate solitary breeding and 25 3-5 m apart to simulate colonial breeding. Length […]
Population increase and aspects of colonization of the Tree Sparrow Passer montanus in the agricultural landscapes of southern Finland
Tree Sparrow (Passer montanus) Science Article 5 abstract While many farmland bird species are declining in Western Europe, the Finnish Tree Sparrow Passer montanus population has increased significantly during recent decades. During 1984-2002, we studied the population changes, colonization characteristics and nest sites of theTree Sparrowin a large area of agricultural landscapewithin southern Finland. The […]
Tree Sparrow Passer montanus freezing in the presence of a Sparrowhawk Accipiter nisus
Tree Sparrow (Passer montanus) Science Article 3 abstract [..] A striking example of freezing behaviour in Tree Sparrows Passer montanus was observed at Tovetorp Zoological Research Station in south-eastern Sweden on 28 February 2002. I observed a Sparrowhawk Accipiter nisus launching an attack, at 14.45 in the afternoon, towards a feeding station located underneath a […]
Habitat use by breeding Tree Sparrows Passer montanus
Tree Sparrow (Passer montanus) Science Article 6 abstract Tree Sparrows Passer montanus showed a strong preference for nest-sites adjacent to wetland habitats, and avoidance of sites on intensively managed mixed farmland distant from Rutland Water. A variety of wetland edge habitats were frequently used by foraging adult birds when provisioning nestlings, and invertebrate prey of […]