Cliff, an injured Peregrine Falcon, is a permanent resident at Audubon Sharon, in Sharon, CT. This fastest raptor species (200mph in a downward stoop!) had almost disappeared by the 1950's. The commonly used pesticide DDT had caused a fatal thinning of the birds' egg shells. Banning DDT, using captive breeding and release, as well as protecting the Peregrine Falcons' natural breeding sites, brought the species back. Populations were healthy enough by 1999 for the bird to be taken off the US Endangered Species List. Another success story for that legislation!