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Why do seagulls' heads move smoothly when they walk?

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Chickens bob their heads while walking. So do cranes, magpies and quails. In fact, head bobbing is a unique feature in birds and occurs in at least 8 of the 27 families of birds. read more

Chickens bob their heads while walking. So do cranes, magpies and quails. In fact, head bobbing is a unique feature in birds and occurs in at least 8 of the 27 families of birds. There are a few theories why some birds bob their heads when they walk: 1. Assists with balance 2. Provides depth perception 3. Sharpens their vision However, most studies suggest that birds in motion bob their heads to stabilize their visual surroundings. read more

Our eyes have the ability to track things very precisely when they move. If you record your eyes following something like your finger you will see it move very smoothly. Birds, on the other hand, cant do this. Instead of moving their eyes to keep something in centre vision, they use their necks. read more

Birds move their heads as they walk because birds rely on head movement, not eye movement, like humans, to see. They bob/sway their heads as a way to stabilize their (new) environment. The bobbing probably (scientifically) has little to do with how they move. read more

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