| mortality of western burrowing owls ( athene cunicularia hypugaea) associated with brodifacoum exposure. | western burrowing owls ( athene cunicularia hypugaea) frequently occupy periurban areas, where they may be exposed to pest control agents. this short communication describes necropsy findings and detected brodifacoum rodenticide levels for four western burrowing owls in lake havasu city, arizona, us, 2013-15. levels detected ranged from 0.077 mg/kg to 0.497 mg/kg. brodifacoum, one of several second-generation anticoagulant rodenticides recently removed from the general consumer market, is still ... | 2017 | 27763828 |
| migratory decisions in birds: extent of genetic versus environmental control. | migration is one of the most spectacular of animal behaviors and is prevalent across a broad array of taxa. in birds, we know much about the physiological basis of how birds migrate, but less about the relative contribution of genetic versus environmental factors in controlling migratory tendency. to evaluate the extent to which migratory decisions are genetically determined, we examined whether individual western burrowing owls (athene cunicularia hypugaea) change their migratory tendency from ... | 2009 | 19437042 |