Bonellis Warbler (Phylloscopus bonelli) Science Article 1 abstract Adult birds replace their flight feathers (moult) at least once per year, either in summer aftertermination of breeding or (in the case of some long-distance migratory species) in the winterquarters. We reconstructed the evolutionary pathways leading to summer and winter moultusing recently published molecular phylogenetic information on […]
Distribution pattern among Golden Eagle Aquila chrys tos and Bonelli s Eagle Hiera tus fasciatus in the Castellon province.
Bonellis Eagle (Aquila fasciata) Science Article 1 abstract Aims: Spatial distribution patterns of Golden Eagle Aquila chrys tos and Bonelli s Eagle Hiera tus fasciatus have been analyzed in a sympatric Mediterranean area.Location: Castellon province and the Teruel border area, in the M strazgo region. Methods: The nearest neighbor distance has been taken as an […]
Heterogeneus use of space in three breeding territories of Bonelli’s Eagle (Hieraaetus fasciatus)
Bonellis Eagle (Aquila fasciata) Science Article 3 abstract Radio-tracking of three breedingadults of Bonelli’s eagle in the ValencianRegion (Spain) was used to estimate their homerange sizes with the minimum convex polygonand Kernel estimator methods and identifytheir core ranges with the last one method.There was a considerable variability in the sizeand shape between the three territories, […]
Low mitochondrial DNA diversity in the endangered Bonelli’s Eagle ( Hieraaetus fasciatus ) from SW Europe (Iberia) and NW Africa
Bonellis Eagle (Aquila fasciata) Science Article 2 abstract This study is an initial survey of the genetic diversity and population structure of the endangered Bonelli’s Eagle (Hieraaetus fasciatus) in SW Europe (Iberia) and NW Africa, two locations where the species has undergone a severe decrease in numbers during the last decades. It is also the […]
An observation of attempted interspecific kleptoparasitism between two neotropical Tyrannid flycatchers
Boat-billed Flycatcher (Megarynchus pitangua) Science Article 1 abstract Kleptoparasitism, the interspecific and intraspecific stealing of already procured food, is well known among many taxa of birds (Brockmann & Barnard 1979), but has been reported only rarely in the avian family Tyrannidae. To my knowledge there are only two published observations of kleptoparasitism by tyrannid flycatchers, […]
Mongoolse Pieper Anthus godlewskii (Dutch article)
Blyths Pipit (Anthus godlewskii) Science Article 1 abstract During November-December 2005 a Blyth’s Pipit Anthus godlewskiiwas present at Oostende. This is fourth record forBelgium. The description pays special attention to the differenceto Richard’s Pipit Anthus richardi. PETER ADRIaeNS & GERALD DRIESSENS, Natuur.oriolus 72(4): 127-131 Download article download full text (pdf)
Does choice of estimators influence conclusionsfrom true metabolizable energy feeding trials?
Blue-winged Teal (Anas discors) Science Article 1 abstract True metabolizable energy (TME) is a measure of avian dietary quality that accounts for metabolic fecal and endogenous urinary energy losses (EL) of non-dietary origin. The TME is calculated using a bird fed the test diet and an estimate of EL derived from another bird (Paired Bird […]
Blue-tailed emerald Hummingbird (Chlorostilbon mellisugus) nesting and nestling development
Blue-tailed Emerald (Chlorostilbon mellisugus) Science Article 1 abstract A nest of the Blue-tailed Emerald Hummingbird (Chlorostilbon mellisugus) was studied from the early finding of two eggs through to the loss of the single surviving nestling on day 19. Nestling growth and development, as well as female attendance during incubation and brooding are reported. The body […]
Communal roosting of Linnets (Carduelis cannabina) and Blue-headed Wagtails (Motacilla flava) at post-breeding period in Western Poland.
Blue-headed Wagtail (Motacilla flava) Science Article 2 abstract Communal roosting of Linnets (Carduelis cannabina) and Blue-headed Wagtails (Motacilla flava) at post-breeding period in Western Poland Surmacki A, Lorek G & Tryjanowski P., Vogelwarte. vol 40, no 1-2. p. 146-148 Download article download full text (pdf)
Phylogeographic patterns in Motacilla flava and Motacilla citreola: species limits and population history
Blue-headed Wagtail (Motacilla flava) Science Article 1 abstract We conducted phylogeographic analyses of Motacilla fl ava (Yellow Wagtail) andM. citreola (Citrine Wagtail). We analyzed mitochondrial DNA sequences from 167 M. fl avaspecimens obtained from 17 localities throughout Eurasia and Alaska, and 38 specimens of M.citreola obtained from 7 Eurasian localities. Phylogenetic analysis revealed three clades […]