The height of Ornimegalonyx is estimated to have been about 1.1 meters, and its weight over 9 kilograms. Its legs and feet were very large and well-built, and likely adapted for running.
Ornimegalonyx was originally described in 1954 by Oscar Arredondo, who identified it as a type of terror bird due to its size. In 1961, Pierce Brodkorb found the fossils to be those of a giant owl. Remains of Ornimegalonyx are common in Cuba, and four species in total have been described.
- ↑ 1.0 1.1 Arredondo, Oscar (1976) translated Olson, Storrs L. "The Great Predatory Birds of the Pleistocene of Cuba" pp. 169-187 in "Smithsonian Contributions to Paleobiology number 27; Collected Papers in Avian Paleontology Honoring the 90th Birthday of Alexander Wetmore"
- ↑ Arredondo, Oscar (1982). Los Strigiformes fósiles del pleistoceno cubano. Boletín de la Sociedad Venezolana de Ciencias Naturales 140, 33-55.
- ↑ Andrews, Peter (1990) "Owls, Caves, and Fossils: Predation, Preservation, and Accumulation of Small Mammal Bones in Caves, with an Analysis of the Pleistocene Cave Faunas from Westbury-sub-Mendip, Somerset, UK" University of Chicago Press. 231pages. ISBN 0-226-02037-1, ISBN 978-0-226-02037-2