Newborn dolphins and the mother dolphins don't sleep for a month, they always keep their one eye open all the time.
This bird can sleep with their half brain just for 42 minutes over 12 hours.
This insect sleeps for a very short time period.
This fish is unable as well as not needed to sleep because they don't have a central nervous system.
This frog can stay awake and alert for a long time.
In these species, the baby orcas cannot sleep for a few months while the adult one's can swim during their sleep.
This fish can stay without sleep for 22 weeks after birth.
Butterflies also don't sleep, they just rest with their open eyes.
Walrus can stay awake for 84 hours.
This creature can survive the whole day with just 5 minutes of sleep.