A warning by CLIFFORD HORNBY Some species, like the Barn Owl, are already threatened with extinction: several others much diminished. Who is to blame? Who is helping the birds most?
CLIFFORD HORNBY , himself an amateur falconer, -talks to farmers, pesticide makers and users, sportsmen, people who are trying to protect birds, and some who just like them. Produced by Richard KEEN
ContributorsUnknown: Clifford Hornby
Unknown: Clifford Hornby
Produced By: Richard Keen