In the lab, scientists filmed hoatzin nestlings climbing on inclined surfaces and swimming in water from different angles to study how they used their limbs to move.

Hoatzin nestlings (Opisthocomus hoazin) climbing and swimming in the lab

A. Abourachid et al., “Hoatzin nestling locomotion: Acquisition of quadrupedal limb coordination in birds,” Science Advances, doi:10.1126/sciadv.aat0787, 2019.

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