Killdeer (Charadrius vociferus) Science Article 5 abstract Strychnine poisoning of 36 dunlin (Calidris alpina) and two killdeer (Charadriusvociferus) in Yolo County, California (USA) was documented from 1 1 to 17 December 1990. Birds were found dead on a field containing treated wheat seeds (337 zg strychnine/g seed) in postures consistent with the known physiopathology of […]
ENERGY EXPENDITURE IN REPRODUCTIVE EFFORT OF MALE AND FEMALE KILLDEER (CHARADRIUS VOCIFERUS)
Killdeer (Charadrius vociferus) Science Article 1 abstract The reproductive investment strategies of the sexes during the breeding season are detailed for Killdeer (Charadrius vociferus), a monogamous plover. I measured the energy investments of the sexes in reproductive, mating, and parental effort. As predicted, males expend more mating effort than females; however, the sexes expend equal […]
SPACE USE OF KILLDEER AT A GREAT BASIN BREEDING AREA
Killdeer (Charadrius vociferus) Science Article 6 abstract Wetland conservation efforts require knowledge of space use by a diversity of waterbirds. However,determining space use of animals requires intensive monitoring of individual organisms. Often, activity patternsduring much of the annual cycle are neglected in analyses of home range and habitat use. From 1995
Diet of nesting Killdeer in North Dakota
Killdeer (Charadrius vociferus) Science Article 3 abstract Killdeer (Charadrius vociferous) is one of the most widespread of all North American shorebirds and, unlike other shorebirds, tolerates a wide variety of open inland habitats in addition to the shores of coastal and inland water. JEANNE M. FAIR, PATRICIA L. KENNEDY, AND LOWELL C. MCEWEN, Wilson Bull., […]
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 […]
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 […]
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 […]
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 […]
Influence of hatching order on growth rate and resting metabolism of kestrel nestlings
Kestrel (Falco tinnunculus) Science Article 3 abstract Hatching asynchrony in altricial birds may result in a competitive disadvantage for the youngest nestlings compared to older siblings. We studied the effects of a size hierarchy on the growth rate of Eurasian kestrels Falco tinnunculus chicks in nests with and without access to supplemented food in western […]
Inter-sexual differences in the immune response of Eurasian kestrel nestlings under food shortage
Kestrel (Falco tinnunculus) Science Article 2 abstract When resources are limited, parents should decide the optimal number, size, and sex of progeny, and offspring should decide the optimal allocation of resources to different costly functions, such as growth and immunity. We manipulated clutch sizes of Eurasian kestrels by one egg to estimate possible cumulative effects […]