Knowra Phorusrhacidae Phorusrhacidae Phorusrhacidae is an extinct family of large, flightless predatory birds, commonly called terror birds. They lived mainly in South America, with some species reaching North America.
Cariamiformes : Cariamiformes is a bird order that includes seriemas and the extinct terror birds. Phorusrhacids belong to this order, whose living members are seriemas.
Phorusrhacos : Phorusrhacos is a large Miocene terror bird known from fossils in Patagonia. Its remains provide a well-known example of the family’s robust skull and limbs.
South American terrestrial faunas : South American terrestrial faunas are the continent’s land-animal communities across geological time. Phorusrhacids evolved and diversified amid South America’s long period of geographic isolation.
Kelenken : Kelenken is an extinct terror bird from Miocene Patagonia, represented by a remarkably large skull. Its skull is among the largest known from any bird and anchors estimates of terror-bird size.
Seriemas : Seriemas are long-legged South American birds and the closest living relatives of terror birds. Their anatomy offers a living point of comparison for phorusrhacids.
Andalgalornis : Andalgalornis is an extinct terror bird from Argentina, known for a relatively narrow, deep skull. Finite-element analyses of its skull have informed hypotheses about its feeding strikes.
Great American Biotic Interchange : The Great American Biotic Interchange was the movement of land animals between North and South America after their connection. Some terror birds spread north during the interchange, including Titanis.
Brontornis : Brontornis is a giant extinct bird from Miocene Patagonia, historically classified among the terror birds. Its placement within Phorusrhacidae has been disputed, illustrating uncertainty in the family’s fossil record.
Ratites : Ratites are a traditional grouping of mostly flightless birds, including ostriches, emus, and rheas. Like ratites, phorusrhacids lost flight, but they belong to a different bird lineage.
Terror bird locomotion : Terror bird locomotion concerns how these flightless birds moved on land, including running and walking. Their long legs indicate terrestrial mobility, though exact running speeds remain uncertain.
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