AMNH/D. Finnin, Stanton F. Fink, Tiny Fox Lab

The Cuban giant owl or giant cursorial owl (Ornimegalonyx) is an extinct genus of giant owl that measured 1.1 metres (3 ft 7 in) in height. It is closely related to the many species of living owls of the genus Strix. It was a flightless or nearly flightless bird and it is believed to be the largest owl that ever existed. It lived on the island of Cuba.Tiny Fox Lab Facts

Strix is a genus of owls in the typical owl family (Strigidae), one of the two generally accepted living families of owls, with the other being the barn-owl (Tytonidae).

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Source: https://en.wikipedia.org/wiki/Ornimegalonyx