Animal / Haiwan

Hummingbirds, burung yang boleh terbang mengundur, sayapnya mampu mengepak sebanyak 80 kali sesaat, dengan sendi kepak yang mampu berpusing 180 darjah

Hummingbirds can fly backwards, can also beat their wings up to 80 times per second with a unique ball-and-socket shoulder joint so the wing can rotate 180 degrees

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