Category: Passeridae

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 […]

Impaired hatching success and male-biased embryo mortality in Tree Sparrows

Tree Sparrow (Passer montanus) Science Article 4 abstract During the past 30 years, many species of farmland birds have declined dramatically in numbers in Northern Europe, a trend coinciding with a tremendous intensification of agriculture, although the exact causes of these declines remain unclear. One of the worst affected species is the Tree Sparrow (Passer […]