Merlin (Falco columbarius) Science Article 1 abstract I studied variables affecting size of hunting range in breeding Merlins (Falco columbarius) from May to July, 1987-l 990 in Saskatoon, Canada. Males were monitored during most of the breeding season, whereas females were observed only in the fledging period when they hunt. During the incubation period, the […]
Tag: all of Falco
SEX DETERMINATION OF LESSER KESTREL (Falco naumanni ) BY PCRRFLP FROM FEATHER SAMPLES
Lesser Kestrel (Falco naumanni) Science Article 1 abstract The Lesser Kestrel (Falco naumanni) is a small colonial migratory falcon, mostly insectivorous (grasshoppers and locusts), that breeds in South Italy between March and September. Populations have decreased by 90% since the middle of the 20th century in Europe Costantini V., Guaricci et al, S.I.R.A., 2007 Download […]
International Action Plan for the Lanner Falcon Falco biarmicus
Lanner Falcon (Falco biarmicus) Science Article 2 abstract The Lanner Falcon is classified as Endangered at the European level and is categorised as SPEC 3(Tucker & Heath 1994). It is also listed in Annex I of the European Union’s Wild Birds Directive,Appendix II of the Bonn Convention, Annex II of the Bern Convention, and Appendix […]
Behaviour of female Eurasian Kestrels during laying: are there time constraints on incubation?
Kestrel (Falco tinnunculus) Science Article 1 abstract To investigate time, energy, and temperature constraints on hatching asynchrony in Eurasian Kestrels (Falco tinnunculus), we observed females during the laying period and quantified the time spent hunting to see whether this might limir time spent incubating. We predicted that females would hunt more in years when the […]
Variation in the quality of parental care at falcon nests in South Africa as evidence for postulated differences in food availabi lity.
Lanner Falcon (Falco biarmicus) 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 […]
Paternity assurance in two species of colonially breedingfalcon: the kestrel Falco tinnunculus and the red-footedfalcon Falco vespertinus
Kestrel (Falco tinnunculus) Science Article 11 abstract Mate-guarding and frequent within-pair copulations are the two main paternityguards of male birds. Some species of birds of prey depend on large foraging areas due tothe availability and dispersion of their food, and males supply their females with food frommating until early chick rearing. Furthermore, birds of prey […]
Size-mediated dominance and begging behaviour in Eurasian kestrel broods
Kestrel (Falco tinnunculus) Science Article 4 abstract Resource allocation from parents to their offspring can be modulated by inter-sexual size dimorphism. High dimorphism promotes differential costs in rearing male and female offspring and unequal competitive ability among siblings. We examined whether any of these types of biases occur in Eurasian kestrels, Falco tinnunculus, in which […]
Year- and sex-dependent effects of experimental brood sex ratio manipulation on fledging condition of Eurasian kestrels
Kestrel (Falco tinnunculus) Science Article 5 abstract 1) Offspring sex ratio may be an unpredictable component of life history that might select for behavioural plasticity in parental care. If the parents do not have such plasticity and the two sexes of offspring differ in size, individuals in a brood or litter biased towards the larger […]
Breeding biology and nest characteristics of the Eurasian Kestrel in different environments on an Atlantic island
Kestrel (Falco tinnunculus) Science Article 9 abstract We studied reproductive parameters, nest-site characteristics and breeding success of theEurasian Kestrel (Falco tinnunculus canariensis) on Tenerife Island, Canary Archipelago.Kestrels typically breed in cliffs cavities (79.4%), and were present in all habitatsfrom sea level to 2,400 m, except in shrubby heaths (rich in Myrica faya and Ericaarborea) and […]
Intermittent Gliding in the Hunting Flight of the Kestrel, Falco Tinnunculus
Kestrel (Falco tinnunculus) Science Article 6 abstract The hunting flight of the kestrel (Falco tinnunculus) consists of short bouts of flight at wind speed against the wind with the eyes in a fixed position relative to the ground, and of short flights from one such position to the next. High speed films taken with a […]