There is succinct species description and status from the Summer 2010 edition of BirdLife Cyprus Magazine that I wish more people could see:
The Raven is a common species in Europe and once very common in Cyprus but today its population numbers only around 4 pairs. This decline was caused mainly by the use of poisoned baits aiming to eliminate foxes and feral dogs.
The Raven is all black with a metallic sheen and is the largest member of the crow family with a wingspan of 130cm. It pairs for life and feeds on dead animals.
Conservation work, regulatory measures and public awareness are needed if we want this bird to survive on [Cyprus].
As with Griffon Vultures in Cyprus, the poisons used in (failed) attempts to eliminate nuisance animals have had toxic consequences. Although it may be on a smaller scale, this is exactly the sort of ecological devastation that Rachel Carson wrote about 50 years ago in Silent Spring.