Chubby king penguins wobble when they waddle

fat vs. thin penguins

When king penguins put on weight, it changes their waddling posture and causes them to walk less steadily (right) than when they are thinner (left), a new study suggests. Given that previous work has suggested that fat penguins expend the same amount of energy as thin penguins when walking, it’s unclear what the metabolic cost of this wobbling might be. 

Astrid Willener

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