One of the most great bird it is called : Potoo Bird

Birds are usually calming and lovable creatures. Unless you have ornithophobia, of course, in which case, the Great Potoo is one bird you will be dead scared of; it is a bird almost everyone will be scared of, ornitho-phobic or otherwise. This bird looks like one of those creepy, perpetually high, and possibly knife-wielding individuals.  The Great Potoo, however, is not half as dangerous; only really scary. It is the largest bird in the potoo species (it can grow up to 24 inches!), and its most noticeable feature is its large, orange-yellow eyes that look ready to pop out of their sockets. Other than this, its drawn-out rasping growl, which sometimes resembles a bark, is a characteristic feature of the Great Potoo.