The Natural Beauty of Guyana. Wildlife The Cock-of-the-Rock. The most eye-catching Cock of the rock is one of the world's most spectacular birds. It is an important dispenser of the seeds of fruit bearing trees in tropical forests and its courtship behavior concentrates these seeds at certain localities, influencing the kinds of trees and shrubs that are predestined to grow there. Its fantastic plumage and colorful courtship display can equal those of any bird of paradise.