Hoatzin nestling birds, known for their unusual mobile claws on their wings, can walk and swim using a coordinated movement of their four limbs, according to a new Science Advances study. Their movements, combined with their striking similarities in claws and wing bone length to the transitional bird Archaeopteryx, suggest that some early forms of birds could have also used this type of quadrupedal locomotion. #BiodiversityDay #IBD2019 https://advances.sciencemag.org/content/5/5/eaat0787 | Scien

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