Although they feed calmly

como medio para impresionar a las hembras o intimidar a otros machos durante la competencia por el territorio o por parejas

suggesting that it was an agile and fast terrestrial predator

it would have been an attempt at an attack from the side or from behind

suggesting that it was an active hunter in low-light areas

Brontornis burmeisteri gazella Although they feed calmlyMorphological description and paleoecological considerations of Brontornis burmeisteri (Aves, Phorusrhacidae?) from the Miocene of Argentina Brontornis burmeisteri , one of the most impressive fossil birds in the South American record, is known from remains found in Middle Miocene sediments (approximately 17 to 15 million years ago) in the Santa Cruz Formation, located in Argentine Patagonia. Initially assigned to the family Phorusrhacidae, this taxon