Category Archives: Friends of Miles

Peregrine Falcon: Dr. J. Murray Speirs

As a predator at the end of its food chain, this was always a rare bird.

Peregrine Falcon (5 months old)

With the advent of the persistent insecticides it was almost wiped out, accumulating DDT in its tissues from every infected prey consumed until its egg shells thinned and produced no viable young.

Peregrine Falcon

With the banning of DDT and introductions from less contaminated areas it appears to be making some comeback.

Peregrine Falcon (5 months old)

This is a crow-sized falcon with dark brown or blue black and prominent “mustache” markings on its face.

Peregrine Falcon

When perched, Broad-winged Hawks can look very similar but they lack the toothed beak of a falcon.

Peregrine Falcon (5 months old)

In flight the pointed wings and great speed of the peregrine is evident as is its effect on gulls, ducks and pigeons that fly up and scatter in alarm when the Peregrine is just a speck on the horizon.

Peregrine Falcon

Dr. J. Murray Speirs