The number of American kestrels has dropped sharply. That goes against the trend for birds of prey, broadly seen as a conservation bright spot.
Hypotheses about the decline abound.聽In a newly published special issue on kestrels in The Journal of Raptor Research, Dr. Smallwood and David Bird, an emeritus professor of wildlife biology at 香蕉视频 in Montreal, list seven possible factors for kestrel declines that they argue merit more research, in no particular order.