CLUTCH SIZE AND LAYING DATE IN THE KESTREL FALCO TINNUNCULUS: EFFECT OF SUPPLEMENTARY FOOD

Covariation of Clutch Size, Laying Date, and Incubation Tendency in the American Kestrel

Seasonal decline in clutch size is common in birds, but the proximate mechanisms for this phenomenon have not been elucidated. The most credible model to date posits that late-laying females lay fewer eggs due to a seasonal increase in the tendency to incubate during laying, which inhibits egg production. We tested this model with free-living and laboratory American Kestrels (Falco sparverius) ...

Skin carotenoid concentration correlates with male hunting skill and territory quality in the kestrel Falco tinnunculus

In the context of sexual selection carotenoid based signals are candidates for indicator traits: they have to be taken up in the diet by animals, they can indicate the ability of the bearer to accumulate a limited resource, and they help in maintaining the health status. We investigated the yellow-orange colouration of the tarsi of the kestrel Falco tinnunculus in relation to sex, diet and to d...

Blood Cell Morphology, Some Hematological and Serum Biochemistry Values of Common Kestrel (Falco tinnunculus)

In this study, morphological characteristics of peripheral blood cell, and certain hematological and serum biochemistry values were determined in 16 clinical healthy adult common kestrels in order to establish normal reference values for this population. Seven different types of blood cells were determined, such as erythrocytes, thrombocytes, big lymphocytes, monocytes, heterophils, basophils, ...

p,p'-DDE residues in eggs of European kestrel Falco tinnunculus from Tenerife, Canary Islands, Spain.

Winter predation by Common Kestrel Falco tinnunculus on Pipistrelle Bats Pipistrellus pipistrellus in Southern Spain