White-faced Whitestart (Myioborus albifacies) Science Article 3 abstract From 1980 to 1982, 8-30% of male Blackpoll Warblers (Dendroics atriata) studied on Kent Island, New Brunswick, were bigamous each year (2 = 16.8%). I tested whether differences in the quality of the breeding situation can give rise to polygynous matings. Five territory parameters and two male […]
Category: Passeriformes
Seasonal variation in bill morphology of Nuthatches Sitta europaea dietary adaptations or consequences?
Wood Nuthatch (Sitta europaea) Science Article 3 abstract Bills of juvenile Nuthatches continue to increase in size (length and depth) for up to three months after fledging. Bills of individual full-grown birds increase in length from April to October with a temporary drop in June, and decrease throughout the winter season. Bill depth increases from […]
Do male Nuthatches (Sitta europaea) guard their mates?
Wood Nuthatch (Sitta europaea) Science Article 1 abstract We expected to find a clearly manifested mate guarding behaviour in males of Sitta europaea as males of this socially monogamous species participate extensively in parental care. We recorded behaviour of nuthatches during one breeding season in primaeval stands of the Biatowie
Extra-pair young despite strong pair bonds in theEuropean Nuthatch ( Sitta europaea)
Wood Nuthatch (Sitta europaea) Science Article 2 abstract We choose the European Nuthatch (Sitta europaea), an extremely socially monogamous passerine species, to investigate the breeding biology and frequency of extra-pair activities of females. Breeding individuals live in strong pair bonds for their total life and defend their territory all year round. As a consequence of […]
Yellow Warbler nests: building materials and cowbirdparasitism
Yellow Warbler (Dendroica petechia) Science Article 4 abstract Nests are traditionally defined as receptacles in which to house eggs and chicks; however, for the Yellow Warbler (Dendroica petechia), nests may have additional biological significance, especially with respect to Brown-headed Cowbird (Molothrus ater) parasitism. Michelle Mico, UFS (Delta Marsh) Annual Report, Vol. 30, 1995 Download article […]
Notes on the Yellow Warbler in Surinam.
Yellow Warbler (Dendroica petechia) Science Article 9 abstract The Yellow Warbler (Dendroica petechia) is a common winter visitor in Surinam. According to Zimmer (Amer. Mus.Novit. No. 1428, 1949: 5), only the race aestiva has been taken there, but the race brewsteri probably also occurst here since it has been found in both British and French […]
Species Limits In Antbirds (Thamnophilidae): The Warbling Antbird (Hypocnemis Cantator) Complex
Warbling Antbird (Hypocnemis cantator) Science Article 1 abstract Recordings examined. The following list identifies recordings used in the study by taxon, country, state or department, recording location, and recordist. Taxon codes reflect the names of current subspecies within whose range they fall. Numbers following the recordist name identify the number of cuts per recordist per […]
Nesting Records Of Five Antbird Species From The Colombian Amazon
Warbling Antbird (Hypocnemis cantator) Science Article abstract Few nests of Amazonian antbirds (Thamnophilidae and Formicariidae) have been described. Here we present nesting records for five species of antbirds found in Tinigua National Park, Colombia. A pouchshaped pensile nest of the Warbling Antbird (Hypocnemis cantator) in a treefall gap within seasonally flooded forest contained two eggs […]
Demography and Ecology of Montane ForestBird Populations in the Green Mountains of Vermont
White-faced Whitestart (Myioborus albifacies) Science Article 4 abstract Bicknell’s Thrush (BITH) and Blackpoll Warbler (Dendroicastriata; BLPW) were selected as focal study species because: 1) Bicknell’s Thrush is restricted to montaneforests and Blackpoll Warbler is a near-obligate resident of this habitat in the Northeast Kent P. McFarland, Christopher C. Rimmer and James E. Goetz, Vermont Monitoring […]
Slow pace of life in tropical sedentary birds:a common-garden experiment on four stonechatpopulations from different latitudes
Siberian Stonechat (Saxicola maura) Science Article 2 abstract It has been hypothesized that organisms living at different latitudes or in different environments adjust their metabolic activity to the prevailing conditions. However, do differences in energy turnover simply represent a phenotypic adaptation to the local environment, or are they genetically based? Martin Wikelski, Proc. R. Soc. […]