The visual acuity and refractive state of the American kestrel (Falco sparverius)

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

The effects of temperature and artificial rain on the metabolism of American kestrels (Falco sparverius).

The effect of rainfall on the metabolism of birds is poorly understood. We measured the metabolism as rate of oxygen consumption (VO2) of four male and four female American kestrels (Falco sparverius) using open-circuit respirometry. We measured VO2 during the spring at ambient temperatures (Ta) of 5, 10, 15, and 25 degrees C in air without rainfall and with simulated rainfall of 2.5 (low rainf...

Shorter Migration Distances Associated with Higher Winter Temperatures Suggest a Mechanism for Advancing Nesting Phenology of American Kestrels <em>Falco sparverius</em>

Global climate change has affected avian migration patterns and nesting phenology. Changes in one phase of a bird’s cycle will most likely affect other stages, but few studies focus simultaneously on multiple life-history events. We used western North American ringing records and Christmas Bird Counts to examine whether changes in migration patterns were concordant with advancing American kestr...

Investigation of visual acuity and residual refractive error after cataract surgery in patients with senile cataract by phacoemulsification

Background and Aim: Vision improvement and reduction of refractive errors are considered as important goals of cataract surgery. The purpose of this study was to evaluate residual refractive errors after cataract surgery in the patients with senile cataract in Shahid Rahimi Hospital in Khorramabad City between 2017 and 2018. Material and Methods: This cross-sectional study included 178 patients...

Population and Morphological Changes in American Kestrels through Space and Time

Many American kestrel (Falco sparverius) populations are declining across North America. Potential causes include mortality from West Nile Virus, anticoagulant rodenticide exposure, climate change, an increase in avian predators, habitat degradation, and reduction in food availability. We analyzed American kestrel count and banding data from seven raptor migration sites throughout North America...