Planet of Birds

Tree Swallow (Tachycineta bicolor) Science Article 11 abstract Age-related differences in plumage characteristics of birds can be the result of differential survival of more ornamented individuals, within-individual changes in plumage attributes with age, or a combination of both. In this study, we investigated age-class related differences in plumage attributes of male tree swallows Tachycineta bicolor […]

Tree Swallow (Tachycineta bicolor) Science Article 12 abstract Poor breeding success often increases dispersal, but there is conflicting evidenceabout the putative adaptive benefi ts of dispersal behavior. Thus, observational and experimentaldata were analyzed to test whether breeding success (number of young fl edging) infl uencedbreeding and natal dispersal by Tree Swallows (Tachycineta bicolor), using information […]

Tree Swallow (Tachycineta bicolor) Science Article 10 abstract Investment in one life-history stage can have delayed effects on subsequent life-history stages within a single reproductive bout. We experimentally heated tree swallow (Tachycineta bicolor) nests during incubation to test for effects on parental and nestling conditions. Females incubating in heated boxes maintained higher body condition and […]

Tree Swallow (Tachycineta bicolor) Science Article 5 abstract Endocrine disruptors have well-known effects on vertebrate population sex ratios, buta variety of chemicals can also affect sex ratios of invertebrates. We tested whether sex ratios of

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 […]

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 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 […]

Tree Swallow (Tachycineta bicolor) Science Article 8 abstract Much previous research has focussed on the role of food supply in determining thegrowth and the survival of avian offspring. More recently, acid deposition in someecosystems has demonstrated that in addition to energy, birds also need to acquiresufficient nutrients such as calcium to be successful. Whether procurement […]

Tree Swallow (Tachycineta bicolor) Science Article 16 abstract Despite considerable interest in its occurrence or potential occurrence (e.g., Lorenz 1963), both direct and circumstantial evidence of intraspecific killing in adult passerinesis rare (see Davis 1940, Cottrille 1950, Grubbs 1977, Loflin 1982). The purpose of this note is to add to this meager data base by […]

Tree Swallow (Tachycineta bicolor) Science Article 14 abstract The environment experienced during ontogeny has a significant impact on the physiological condition of offspring. This, in turn, forecasts survival probabilities and future reproductive potential. Despite the prominent role that the concept of condition plays in evolutionary studies, the physiological and biochemical characters that define it remain […]