The Blood Beast Terror

The Blood Beast Terror is a 1967 British horror film released by Tigon in February 1968. In the United States it was released by Pacemaker Pictures on a doublebill with Slaughter of the Vampires as The VampireBeast Craves Blood.

Investigating the deaths are Detective Inspector Quennell Peter Cushing of Scotland Yard and his assistant, Sergeant Allan Glynn Edwards. Because Joe keeps ranting about a horrible winged creature with huge eyes, Quennell hatches a theory that perhaps a homicidal eagle is on the loose. At the scene of the latest killing, several shiny scales are discovered.The two latest victims were students of the renowned entomology professor Dr. Carl Mallinger Robert Flemying, who lives nearby with his daughter Clare Wanda Ventham, and their butler, Granger Kevin Stoney. When Quennell brings the scales to Mallinger for identification, Mallinger behaves suspiciously and tries to take all of them. Quennell describes his theory about a killer eagle, but Mallinger dismisses it outright. Quennell is unaware that the entomologist has a pet eagle, which is tormented by sadistic Granger. ........

Source: Wikipedia