Co-Authored By:
Simply so, why do birds move their head when they walk?
The bob is actually an illusion, scientists discovered in an experiment. The birds are simply moving their heads, allowing their vision to stabilize so their bodies can catch up, and then they're on the move again. This happens so quickly, it appears as though they're using a constant bobbing motion.
Consequently, why do chickens jerk their heads?
Independent Vision They, as other birds, can see into the ultraviolet spectrum. They also use their eyes independently, which is why they "jerk" their heads to see things. Chickens move their heads to get objects into focus and to condense an area of binocular vision, while humans move just their eyes.
Rooster wattles attract females, but the reasons are all about food. But it's not the fleshy flaps of skin that hang from the rooster's neck that the hens really care about. Instead, the wattles help females recognize that a rooster is advertising food he's willing to share.