The uplands support a number of bird species, including merlin and peregrine falcon. The cliffs also provide a home for buzzard, kestrel and peregrine falcon. Bird species are varied with the inclusion of eagle, owl and peregrine falcon. This lingering of toxic material led to the near extinction of peregrine falcon. Hen harrier, sparrowhawk, buzzard, kestrel, merlin and peregrine falcon are all seen regularly. The canyon also has raptors including northern harrier, Cooper's hawk, golden eagle and peregrine falcon. Horse Sands Fort is also currently home to a peregrine falcon. Models included the Peregrine Falcon and Phoenix. The Barbary falcon differs in appearance from the peregrine falcon according to Gloger's rule. He was also asked to install a peregrine falcon nest at the top. Quarries and rock outcrops provide nest sites for peregrine falcon and common raven. One of the more popular is called "Sivi Sokole" which translates to peregrine falcon. Populations of the peregrine falcon have bounced back in most parts of the world. The Taita falcon, black eagle, peregrine falcon and augur buzzard breed there. The techniques of diving birds, such as the gannet or the peregrine falcon, are shown.