Tree Swallow (Tachycineta bicolor) Science Article 13 abstract Past and continuing discharges of polychlorinated biphenyls (PCBs) have contaminated the natural resources of the Hudson River. The Hudson River Natural Resource Trustees – New York State, the U.S. Department of Commerce, and the U.S. Department of the Interior – are conducting a natural resource damage assessment […]
Effects of mercury exposure on the reproductive success of treeswallows (Tachycineta bicolor)
Tree Swallow (Tachycineta bicolor) Science Article 7 abstract An experimental tree swallow population wasestablished in the headwaters of the Shenandoah River,Virginia, USA to assess the accumulation and effects ofmercury contamination on birds that eat emergent aquaticinsects. One tributary, the South River, was contaminatedwith mercury before 1950. Reproductive success of swallowsnesting within 50 m of this […]
TREE SWALLOWS (TACHYCINETA BICOLOR) NESTING ONWETLANDS IMPACTED BY OIL SANDS MINING ARE HIGHLYPARASITIZED BY THE BIRD BLOW FLY PROTOCALLIPHORA SPP.
Tree Swallow (Tachycineta bicolor) Science Article 3 abstract Oil sands mining is steadily expanding in Alberta, Canada. Major companies areplanning reclamation strategies for mine tailings, in which wetlands will be used for thebioremediation of water and sediments contaminated with polycyclic aromatic hydrocarbons andnaphthenic acids during the extraction process. A series of experimental wetlands were built […]
Laying order, hatching asynchrony and nestling body mass in TreeSwallows Tachycineta bicolor
Tree Swallow (Tachycineta bicolor) Science Article 6 abstract We studied the reproductive biology of a box-nesting population of Tree SwallowsTachycineta bicolor in southeastern Wisconsin, USA. We were interested particularlyin the relationship between laying order and hatching order and the extent to whicheach was a predictor of nestling body mass. We found that laying order was […]
UNSUITABILITY OF TREE SWALLOWS AS HOSTS TO BROWN-HEADED COWBIRDS
Tree Swallow (Tachycineta bicolor) Science Article 9 abstract Swallows are parasitized rarely by Brown-headed Cowbirds (Molothrus ater). I added cowbird eggs to 15 Tree Swallow (Tachycineta bicolor) nests. One egg disappeared and seven failed to hatch whereas 63 of 66 host eggs hatched. The seven cowbird hatchlings died in 3-12 (mean = 6.3) d, whereas […]
Spring temperatures and laying dates of first eggs of three passerines in Croatia
Tree Sparrow (Passer montanus) Science Article 7 abstract This study is based on the spring temperaturesand laying dates of first eggs of threepasserines (sedentary: Great Tit, Parus majorand Tree Sparrow, Passer montanus; migratory:Starling, Sturnus vulgaris). Laying datesof first eggs were used as estimates of timingof breeding. The term ‘laying date’ is definedas the date 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 […]
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 […]
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 […]
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 […]