Chestnut-sided Warbler (Dendroica pensylvanica) Science Article 2 abstract Vocal learning involving imitation is the prevalent mode of song development in songbirds. The evidence for vocal learning both from experimental studies and from local song variants shared among neighbors (dialects) indicates that songbirds generally learn from their own species, and that a genetically determined signal recognition […]
MOLECULAR SYSTEMATICS, PHYLOGEOGRAPHY, AND POPULATION GENETICSOF XIPHORHYNCHUS (AVES: DENDROCOLAPTIDae) IN THE AMAZON BASIN
Chestnut-rumped Woodcreeper (Xiphorhynchus pardalotus) Science Article 1 abstract Among those few hypotheses amenable to falsification by phylogenetic methods concerning the diversification of the Amazonian biota, three can be singled out because of their verifiable predictions: the riverine barrier, the gradient, and the basal trichotomy hypotheses. I used phylogenetic and population genetics methods to reconstruct the […]
Structural conservation and variation in the mitochondrial control region of fringilline finches (Fringilla spp.) and the greenfinch (Carduelis chloris
Chaffinch (Fringilla coelebs) Science Article 2 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 […]
Chaffinch Fringilla coelebs foraging patterns,nestling survival and territory distribution onlowland farmland
Chaffinch (Fringilla coelebs) Science Article 3 abstract Numbers of many bird species which breed on farmland, and are reliant oncropped land for feeding or nesting, declined between the 1960s and 1990s. Incontrast, Chaffinch Fringilla coelebs numbers increased on farmland over thesame period. This study investigates the influence of both cropped and noncroppedland on Chaffinches foraging […]
Time in captivity, individual differences and foragingbehaviour in wild-caught chaffinches
Chaffinch (Fringilla coelebs) Science Article 4 abstract Wild-caught animals are often given a settling in period before experimental trials are initiated.We used wild-caught chaffinches (Fringilla coelebs) to investigate (a) the effect ofsettling in period duration on the likelihood that chaffinches foraged during experimental trialsand (b) whether settling in period duration influenced measures of foraging and […]
Some aspects of Chaffinch Fringilla coelebs biology, based on an analysis of individuals ringed during 1991 to 2003 in Norfolk, England
Chaffinch (Fringilla coelebs) Science Article 1 abstract From 1991 to 2003, 2,954 Chaffinches Fringilla coelebs were caught and ringed, year-round, at Hilborough, Norfolk, England. The age and sex composition of Chaffinches varied between winters, but no systematic pattern was apparent. The age and sex composition of Chaffinches caught during winter did not vary significantly from […]
Low prevalence of infection by H moparasites in Cetti’ s Warblers Certia cetti from central Spain.
Cettis Warbler (Cettia cetti) Science Article 1 abstract […]. Here we studied the prevalence, age distribution of infected individuals and time of infection by blood parasites in Cetti
Carnivory observed in the Cedar Waxwing.
Cedar Waxwing (Bombycilla cedrorum) Science Article 2 abstract I observed an adult Cedar Waxwing (Bombycilla cedrorum) fly to a tree branch approximately 12 m above the ground with an unidentified nestling bird in its bill. Through 7 X 35 binoculars it appeared the nestling was naked, approximately 3 cm in length and being held by […]
NOTES ON THE CEDAR WAXWING (Bombycilla cedrorum)
Cedar Waxwing (Bombycilla cedrorum) Science Article 3 abstract As is well known, this species belongs to a group which has been a puzzle not only to systematists, but also to ornithologists at large. The three known species of Waxwings, distributed as they are over a wide section of the world, one, the Cedar Waxwing, peculiar […]
CEDAR WAXWING, BOMBYCILLA CEDRORUM,FEEDS ON AVOCADO FLOWERS
Cedar Waxwing (Bombycilla cedrorum) Science Article 1 abstract The mystery of some of the injuries and losses of avocado leaves, flowers and very small fruits was apparently solved, in part by observing cedar waxwing birds. Substantiation of feeding was made by examination of crop con tents where leaf and flower segments were observed. D. O. […]