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Penguins, with their charming waddling gait, may leave us wondering about the structure of their legs and, specifically, if they have knees. Contrary to popular belief, do penguins have knees; however, their knee joints are not visible externally due to their unique anatomy.

A penguin's leg bones are structured similarly to those of other birds, with a femur, knee, tibia, and fibula. The upper part of their leg, corresponding to the thigh, is often mistaken for the entire leg, giving the impression that penguins lack knees. The knee joint is actually located closer to the body and is covered by the penguin's dense, insulating feathers.

In summary, penguins do have knees, but they are concealed within their bodies, contributing to their streamlined and hydrodynamic shape, which is essential for efficient swimming in their aquatic habitats.

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