The Peregrine Falcon in air brush and final details in white gouache. The Peregrine Falcon is a fascinating bird of prey. It is known for its speed, making it the fastest bird in the world. It was endangered in the 1940’s-1970’s because of the effects of DDT and other pesticides. Thankfully, its current population has improved due to many efforts by respected conservation organizations. The falcons have beautiful coloring and piercing black/brown eyes which make it a wonderful subject to paint.