Which 2 species of animal can see behind their back without turning?

Question

Which 2 species of animal can see behind their back without turning?

Answer 1

Many ungulates (hoofed mammals) can see nearly all the way behind them due to the position of the eyes on the sides of the head. This is an evolutionary adaptation to being the prey of many predators - you have more chance of escaping being something's dinner if you can see it creeping up behind you. Horses, deer, antelope and so on all fit into this category.

Chameleons and seahorses are able to move each of their eyes independently - they can swivel their eyes so that they point directly backwards, and thus see behind them without turning their heads.

Owls can see behind them without turning their bodies, since their heads can swivel almost 180 degrees. This is an adaptation to the fact that they cannot move their eyes - they are so huge that there is no room inside the skull for muscles to move them. They must therefore turn their heads to change their line of sight.

Answer 2

Chameleon

http://en.wikipedia.org/wiki/Chameleon

"They can rotate and focus separately to observe two different objects simultaneously. It in effect gives them a full 360-degree arc of vision around their body."

can't think of another one...

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http://www.wonderquest.com/ocean-depth-a...

Q: Can a chameleon or spider see behind itself without turning its head? (Parvin, Singapore, Singapore)

A: Yes. Both can!

Chameleons have eyes mounted in tiny turrets they swivel independently. Each can scan a 180-degree arc from front to back. So, he can see behind with either eye while holding his head and body utterly still. Image.

Jumping spiders can see almost 360 degrees about them — up, down, and all around. They have four pairs of eyes that look in three different directions.

http://www.aaofoundation.org/what/herita...

If you were an American woodcock your eyes would be set higher and closer to the back of your head. An American woodcock on the pitchers mound could see home plate, all the bases, the entire outfield and even the seats – without moving its head! Having a large field of view like the American woodcock helps animals look out for predators. Zebras, ducks, rabbits and chameleons have more side vision than we do, allowing them to see what might be coming from above, the side or even behind them.

Answer 3

Rabbits and Parrots.

Rabbit eyes are placed high and to the sides of the skull, allowing the rabbit to see nearly 360 degrees, as well as far above their head.

Parrots, like most prey animals have eye that are widely spaced, on either side of the head. This allows for a wide range of vision (almost a 360 degree field of sight in some species). This means these birds can see things coming at them from almost any direction and angle.

Answer 4

Owl and sloth i'm thinking.

Answer 5

Frog & toad

Answer 6

an owl