przewalskis horses are extinct from the wild so they are only found in captivity and they usually live for about 20 years in captivity
Female horses sleep in the exact same places as male horses, neither sex has any one preferance when it comes to where they sleep.
Sea horses sleep by staying where they are
Arabian horses sleep like most other breeds of horses. Horses can doze on their feet and take little 'cat naps' throughout the day. They will spend a couple of hours on the ground sleeping in a 24 hour period. Most breeds of horses follow this same sleep/wake pattern.
they sleep laying down
Yes, horses do lay down to sleep, but it is less common for them to sleep in this position compared to standing up. Horses have a unique ability to sleep both standing up and laying down, and will choose their preferred position based on their level of comfort and sense of security in their environment.
The Ground
horses
Probably when they get tired, like all other horses.
No, they don't.
no, they do not, horses are the only known animals to sleep standing up.
Yes, horses can sleep standing up due to a "stay apparatus" in their legs that allows them to lock their joints to remain upright. They do lie down for deeper sleep, but can nap while standing to quickly rest.