Emus are the only birds with a gastrocnemius, a powerful lower leg muscle that forms part of what’s known as the calf muscle in humans. Their unique avian musculature gives emus extra strength to run fast, jump high, and swim effectively.
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Emus are the only birds with a gastrocnemius, a powerful lower leg muscle that forms part of what’s known as the calf muscle in humans. Their unique avian musculature gives emus extra strength to run fast, jump high, and swim effectively.