The Great Potoo (Nyctibius grandis) is a near passerine bird, both the largest potoo species and the largest member of the order Caprimulgiformes (nightjars and allies). They are also one of seven species in one genus, Nyctibius, located in tropical America.
Similar to the owl, this species is also nocturnal. However they prey on eating insects and occasionally bats, which they capture in sallies from high perches.
Possibly its most well known characteristic is its unique moaning growl that the Great Potoo vocalizes throughout the night, creating an unsettling atmosphere in the Neotropics with its nocturnal sounds