Winter Wren (Troglodytes hiemalis) Science Article 2 abstract We examined effects of incubation mate feeding on female incubation behavior and correlates of fitness by providing female Bewick’s Wrens (Thryomanes bewickii) and House Wrens (Troglodytes aedon) with food supplements. Males of these species vary in their rates of feeding; Bewick’s Wrens feed their incubating mates frequently, […]
Category: Passeriformes
Validity of ageing Wrens Troglodytes troglodytes on fourth primary spots
Winter Wren (Troglodytes hiemalis) Science Article 1 abstract Hawthorn (1971) described a criterion for ageing many Wrens Troglodytes troglodytes based on the number of light
How perception and density-dependence affect breeding Woodlarks Lullula arborea
Wood Lark (Lullula arborea) Science Article 2 abstract There is often a perceived conflict between allowing recreational access to the countryside and wildlife conservation. Although many studies have investigated potential impacts on birds, few have assessed the potential impacts of recreational disturbance at the population scale. We studied the impact of disturbance on a Woodlark […]
Abundance of Four Lark Species in Relationto Portuguese Farming Systems
Wood Lark (Lullula arborea) Science Article 1 abstract Throughout much of Europe, farmland birds have declined more than those of other habitats, because of the abandonment of traditional farming systems and the simplification of remaining agricultural systems, including increased use of external inputs (Tucker & Heath 1994, Baldock 1991, Bignal & McCracken 1996). Traditional low-input […]
Open-habitat birds in recently burned areas: the role of the fire extent and species’ habitat breadth
Wood Lark (Lullula arborea) Science Article 3 abstract Single burned areas contained 0 to 15 open-habitat species (mean = 7.6), and in all the areas combined there were 22 species, including 17 with an unfavourable conservation status in Europe. The most frequent were Carduelis cannabina, Lullula arborea, Alectoris rufa, Oenanthe hispanica and Emberiza cia, but […]
DIFFERENTIAL TIMING OF WILSON’S WARBLER MIGRATIONIN ALASKA
Wilsons Warbler (Wilsonia pusilla) Science Article 2 abstract We examined age- and sex-related differences in the timing of Wilson’s Warbler (Wilsoniapusilla pileolata) migration at four locations in Alaska: Fairbanks, Tok, Mother Goose Lake, and Yakutat. ANNA-MARIE BENSON et al, The Wilson Journal of Ornithology 118(4):547-551, 2006 Download article download full text (pdf)
SURVIVAL, PRODUCTIVITY, AND ABUNDANCE IN A WILSON’S WARBLER POPULATION
Wilsons Warbler (Wilsonia pusilla) Science Article 3 abstract We analyzed patterns in the abundance, productivity, and survivorship of a coastal California population of Wilson’s Warbler (Wilsonia pusilla) using capture-recapture data from 18 years of standardized mist-netting conducted during the breeding season. MARY K. CHASE et al, The Auk 114(3):354-366, 1997 Download article download full text […]
A partly chestnut specimen of Variable Seedeater.
Wing-barred Seedeater (Sporophila americana) Science Article 2 abstract Navy pipeline near Gamboa, Panama Canal Zone, Horace Loftin and I collected an adult male Variable Seedeater (Sporophila aurita) with a considerable amount of chestnut in the plumage. There is a faint chestnut malar stripe and a narrow transverse band of chestnut across the throat. Storrs L. […]
When black plus white equals gray: the nature of variation in the Variable Seedeater complex (Emberizinae: Sporophila)
Wing-barred Seedeater (Sporophila americana) Science Article 1 abstract The degree of relationship between the Variable (Sporophila aurita) and Wing-barred (S. americana) Seedeaters has been debated for over 80 years. The discovery of a zone of hybridization between the former and the Gray Seedeater (S. intermedia), not previously considered to be closely related because of its […]
Niche partitioning of two Palearctic passerinemigrants with Afrotropical residents in theirWest African winter quarters
Willow Warbler (Phylloscopus trochilus) Science Article 2 abstract In bird migration systems, the question of coexistence and competition of migrants with residents in the nonbreeding season andtheir role in shaping the evolution of present avian communities is much debated. However, conclusions are often drawn ina speculative way. In the Palearctic-African bird migration system, many studies […]