See Also

• Recreation: Birding (1,800)
• Science: Biology: Flora and Fauna: Animalia: Chordata: Aves (1,485)
• Science: Biology: Zoology: Chordates: Ornithology (95)

• Phorusrhacos - Partial fossils of this bird have been found in Argentina dating back to 27 million years ago.
• Genera and Species of Paleocene Birds - Provides details of the bird genera of this epoch that have been classified from their fossil record.
• BBC Science and Nature: Gastornis - Provides an illustration and information on this fearsome bird, its description, distribution, behavior and history.
• Are Birds Really Dinosaurs? - A DinoBuzz article covering the theory, and objections towards it, of the dinosaurian origin of birds.