Redpoll (Carduelis flammea) Science Article 1 abstract The remarkable variation in plumage and morphological characters in the redpoll complexCarduelis flammea-hornemanni has puzzled taxonomists for several decades. In contrast,molecular studies have not revealed any genetic differentiation among the phenotypic redpollforms. This could either be a result of high present-day gene flow or morphological differentiationfollowing a rapid […]
Feeding ecology of the purple gallinule (Porphyrula martinica) in the central llanos of Venezuela.
Purple Gallinule (Porphyrio martinica) Science Article 3 abstract The food habits of purple gallinules (Porphyrula martinica) were studied through direct observation in the Central Llanos of Venezuela during the rainy season of 1988, from August to December. Purple gallinules consumed an average 56.6% of plant food Zaida Tarano, Ectropicos, vol. 8, no. 1-2, pp. 53-61, […]
Agonistic behavior of breeding purple gallinules porphyrula martinica: potential ecological correlates
Purple Gallinule (Porphyrio martinica) Science Article 2 abstract Purple gallinules Porphyrula martinica are territorial birds that breed in natural ponds with abundant aquatic vegetation as well as in rice fields. Observations of the aggressive behavior during the breeding season conducted on a rice field and on a naturally flooded savanna (estero), in the Central Llanos […]
Genetic relationships in the peregrine falcon (Falcoperegrinus) analysed by microsatellite DNA markers
Peregrine Falcon (Falco peregrinus) Science Article 10 abstract Microsatellite DNA markers were developed from a peregrine falcon (Falco peregrinus)and genetic relationships among peregrine falcons in southern Norway were analysedusing the markers. The genomic DNA library was screened for the presence of dinucleotidemicrosatellite repeats. Twelve loci revealed polymorphism through the initial analysis of24 unrelated peregrine falcons, […]
Kleptoparasitism by Peregrine Falcons on Carrion Crows
Peregrine Falcon (Falco peregrinus) Science Article 4 abstract […]. The study area was Bizkaia, a small province of 2300 km2 located in the north of Spain. In this area we have monitored about 35-38 Peregrine territories since 1997. During this time we have studied the prey of Peregrines in the nests, recording 931 prey of […]
Identification of natal locales of peregrine falcons (falco peregrinus) by trace-element analysis of feathers
Peregrine Falcon (Falco peregrinus) Science Article 12 abstract Samples of secondary remiges collected from nestling Peregrine Falcons (Falco peregrinus) in Alaska and western Greenland were analyzed for trace-element content using instrumental neutron-activation analysis. Concentrations of 14 trace elements were subjected to a series of multivariate discriminant function analyses to ascertain whether or not these concentrations […]
Variation in the quality of parental care at falcon nests in South Africa as evidence for postulated differences in food availabi lity.
Peregrine Falcon (Falco peregrinus) Science Article 1 abstract Parental care by Peregrine Falcons Falco peregrinus an d Lanner Falcons F. biarmicus during the nestling period was studied in two areas of South Africa. Comparisons were made between the quality of care administered to broods of Peregrine Falcons at nests in tropical (the Soutpansberg) an d […]
Predator avoidance behaviour of a solitary Willet attacked by a Peregrine Falcon
Peregrine Falcon (Falco peregrinus) Science Article 13 abstract During the non-breeding season, Willets Catoptrophorussemipalmatusu se a variety of tacticst o avoid predatorsa ndhave beenr eportedt o take flight, submergeth emselvesinwater, and hide in or near marsh vegetation JOSEPH B. BUCHANAN, Bulletin 104 August 2004 Download article download full text (pdf)
Nest defence by Lapwings : observations on natural behaviour and an experiment.
Peregrine Falcon (Falco peregrinus) Science Article 6 abstract Lapwings Vanellus vanellus are ground-nesting waders and they protect their nests by aggressively attacking predators near their nests . We investigated the response of parents to natural predators and a dummy Hooded Crow Corvus [corone] cornix during the incubation period. First, we investigated whether the presumed value […]
Curved flight paths and sideways vision in peregrine falcons (Falco peregrinus)
Peregrine Falcon (Falco peregrinus) Science Article 7 abstract When diving at prey straight ahead from great distances at high speeds, a peregrine has a conflict between vision and rodynamics: it must turn its head approximately 40 deg to one side to see the prey with maximum visual acuity at the deep fovea of one eye, […]