Brown Thrasher (Toxostoma rufum) Science Article 4 abstract The role of syringeal muscles in controlling the aperture of the avian vocal organ, the syrinx, was evaluated directly for the first time by observing and filming through anendoscope while electrically stimulating different muscle groups of anaesthetised birds. Ole Naesbye Larsen and Franz Goller, The Journal of […]
Category: Passeriformes
BROOD PARASITISM BY BROWN-HEADED COWBIRDS ONBROWN THRASHERS: FREQUENCY AND RATES OF REJECTION
Brown Thrasher (Toxostoma rufum) Science Article 6 abstract Rates of brood parasitism by Brown-headed Cowbirds Molothrus ater on nests of Brown Thrashers Toxostoma rufum in south-central North Dakota ranged from 3% to 18% from 1984-1986. The average observed rate of parasitism, 12%, was higher than typically reported for Brown Thrashers. We conducted an experiment to […]
Prevalence of Bill Abnormalities in Florida Brown Thrashers
Brown Thrasher (Toxostoma rufum) Science Article 1 abstract The Brown Thrasher (Toxostoma rufum) in Florida exHibits a high rate of occurrence of an elongated sickle-bill type of abnormality. This observation became evident after having reviewed the literature on the subject and after I captured an apparently healthy thrasherwith an elongated, decurved bill in north Tampa, […]
Structural conservation and variation in the mitochondrial control region of fringilline finches (Fringilla spp.) and the greenfinch (Carduelis chloris
Brambling (Fringilla montifringilla) Science Article 1 abstract We sequenced the entire control region and portions of flanking genes (tRNAPhe, tRNAGiu, and ND6) in the common chaffinch (Fringilla coelebs), blue chaffinch (F. teydea), brambling (F. montifringilla), and greenfinch (Carduelis chloris). In these finches the control region is similar in length (1,223-1,237 bp) and has the same […]
Abundance of owls and Bramblings Fringilla montifringilla inrelation to mast seeding in south-eastern Sweden
Brambling (Fringilla montifringilla) Science Article 2 abstract We investigated the relationship between mast seeding in beech Fagus sylvaticus and oak Quercus spp., and the occurrence of the rodent-dependent predators Tengmalm’s Owl aegolius funereus, Long-eared Owl Asio otus and Tawny Owl Strix aluco in south-eastern Sweden (Blekinge) 1992-2000. We also compared available data on seed production […]
A phylogenetic analysis of the evolution of moultstrategies in Western Palearctic warblers (Aves:Sylviidae)
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 […]
Genetically confirmed interbreeding between western Bonelli’s warbler ( Phylloscopus bonelli ) and wood warbler ( P. sibilatrix )
Bonellis Warbler (Phylloscopus bonelli) Science Article 2 abstract During May and June 2003, a mixed breeding pair consisting of a male western Bonelli’s warbler (Phylloscopus bonelli) and a female wood warbler (P. sibilatrix) successfully raised six young in a broad-leafed forest near Junkerath, western Germany, an area far outside the regular breeding range of P. […]
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)
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, […]
LIFE HISTORY OF THE BLUE AND WHITE SWALLOW
Blue-and-white Swallow (Notiochelidon cyanoleuca) Science Article 1 abstract This Swallow has the upper plumage is dark, violaceous steel-blue; the under parts are pure white except for the blue-black under tail-coverts, the grayish-brown sides and flanks, and a few dusky spots in the center of the chest, which are lacking on some individuals. The tail is […]