The Mystery of the Vanishing Kestrels: What’s happening to this flashy falcon?

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. 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 McGill University in Montreal, list seven possible factors for kestrel declines that they argue merit more research, in no particular order.

Read the article in the New York Times.