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- W4249969074 abstract "We explore our current understanding of the origin of birds, from their non-avian dinosaurian ancestors to the seemingly-endless diversity of forms we see today. First, we explore the question, “What is a bird?” by discussing how birds relate to other animals, both living and extinct. We clarify that birds are consistently defined with respect to flight. But, the first birds were incredibly different from any birds we have today. We trace which bird traits arose in non-flighted dinosaurs and which arose after the origin of flight. Advances in our understanding of avian relationships, as well as countless paleontological discoveries, have revealed that many of the features considered uniquely avian among living animals have deeper, more ancient evolutionary origins than previously suspected. We focus first on traits that leave direct traces in the fossil record such as bony features and fossil feathers. Then we focus on evidence that informs the evolution of those behavioral, physiological or cognitive traits: flight, metabolic rate, brain size and vocalization. Finally, we discuss future directions for work on bird origins." @default.
- W4249969074 created "2022-05-12" @default.
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- W4249969074 date "2021-01-01" @default.
- W4249969074 modified "2023-09-27" @default.
- W4249969074 title "Bird Origins" @default.
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- W4249969074 doi "https://doi.org/10.1016/b978-0-12-409548-9.12030-5" @default.
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