A dolphin
I believe a shark sleeps with one eye open.
every dolphin sleeps with one eye open.
The Eye That Never Sleeps - 1912 was released on: USA: 14 May 1912 UK: 14 July 1912
A cow is a mammal.
It may indicate an issue such as an eye infection or injury, so it would be best to monitor the hamster closely and consult with a veterinarian if the behavior persists or if you notice any other concerning symptoms.
From a Bird's Eye View - 1970 Nobody Sleeps on a Honeymoon 1-6 was released on: USA: 3 May 1971
Some seals do.
to open the eye store you have to take an eye test and you have to answer backwards.then go outside and climb the ladder and open the door
Octopus. 8 legs, one eye, lives in the ocean.
horses sleep standing up bats sleep upside down dolphins always keep one eye open according to the Sleep Foundation, a particular kind of baboon sleeps on its heels on top of a tree
Don't think so because they are a mammal just like us.
Snakes sleep with their eyes open because they don't have eyelids (so it's not possible to close their eyes). The shark also sleeps with it's eyes open, while still moving around. Cows do that also. Some other reptiles do that to. To summarize it, many animals sleep with their eyes open.Also, some birds and aquatic mammals have been shown to sleep with their eyes open. In all probability this is an evolved defense mechanism in response to the environment and nothing to do with the same thing in humans. Interestingly animals that sleep with one eye open actually do sleep with one half of their brain while the other half is still awake. Humans do not have this ability.See the related link for more information.Fish and Snakes, as most of them do not have eyelids.