Sleep Humans need vs Sleep Animals need

Sleep Humans need vs Sleep Animals need
Humans 7-9 hours ---Horse 3 hours ---Cow 4 hours ---Elephant 4 hours ---Giraffe 4.5 hours--- Rabbit 8 hours ---Guinea Pig 9.5 hours--- Baboon 9.5 hours ---Dophin 10 hours ---Dog 10 hours ---Cat 12.5 hours ---Hampster 14 hours ---Sloth 14.4 hours ---Bat 19 hours