A duck can’t walk without bobbing its head

Photo courtesy: Pritam B. Debnath

Birds bob their heads to improve their depth perception. Since most birds have eyes that are placed more on the sides, rather than the fronts, of their heads, much of their vision is monocular. Bobbing their heads back and forth helps them determine the relative distances of objects in their field of view.


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Jellyfish have been around for 650 million years, which means they have outlived dinosaurs and sharks
A cockroach can live up to several weeks without its head
Giant penguin about the size of a grown man waddled around New Zealand about 59 million years ago
Fish feel pain and suffer just like mammals and birds
Tigers are the only cat species that are completely striped even on their skin and no tiger as the same pattern of strips
All the ants on Earth weigh more than all the humans
It takes a sloth two weeks to digest its food
Around 50 percent of orangutans have fractured bones
A snail can sleep for three years
Cobras can live for upto 20 years