What Animals Sleep Standing Up. Most bird species sleep standing up, including owls, hawks, and hummingbirds. Here is the list of animals that can sleep standing up:
Many birds such as mallard ducks Furthermore, some birds also sleep standing up and have the body balancing feature while sleeping. You might have seen horses taking a nap while standing and wondering what other animals also sleep in standing position.
Fishes sleep with their eyes open, as they don’t have eyelids.
Cows, horses, zebras, elephants, bison, moose, rhinos and other similar herbivore type animals all. So, do horses sleep standing up or lying down? Penguins sleep standing up with one eye open. These animals are able to lock their legs so that the.