Maybe shes just tried and wants to rest.
There is no real way to just look at the body of a rabbit and decide whether it is male or female. Unfortunately, you just have to get down there and look. --Newfoundland97
It has been suggested that dogs and cats turn round before lying down because when they sleep on grass they are more comfortable if the grass has been flattened. This is naturally a part of them so they naturally turn around before lying down.
So that while lying down in the grass, they can still hear if danger approaches.
The only way to really be sure that your rabbit is female is by examining the genitalia, which means turning the rabbit upside down. Always be very careful when examining rabbits: a struggling rabbit can easily injure itself or you. Have someone else hold the rabbit, while you examine the genitalia. Don't attempt to turn your rabbit upside down unless you know how to do it safely. If you aren't sure, bring your rabbit to the vet for sexing.When you turn the rabbit upside down, if you see testicles, you're looking at a male rabbit.If you don't see testicles, the rabbit could still be male (he could be neutered, or a juvenile, or he could have pulled his testicles into his abdomen as a response to stress or danger). The only way to really tell if a rabbit is male or female is to examine the genital opening. Press gently and the genital organ (the penis or vulva) will pop out. If the hole at the end of the organ is a slit, line, or slash, the rabbit is female. (If the hole is more of a small round dot, the rabbit is male.)See the related links below for pictures and more details.
He/she could be doing it for fun, or maybe because he/she is bored. If he/she does it before sitting or lying down, that is a natural behavior of both dogs and cats before sitting or lying down. In their wild environment, that would help to pat down tall grass so they could have a comfortable place to sit or lie down.
It might be a camouflage by contrast mechanism wherein the predator is focused on the white tail so much that the rabbit can just sit down to hide the white tail and is no longer visible to predator. I have noticed that my cocker spaniels, and this is quite likely true for other predators too, are excellent at detecting motion but no good at picking out a rabbit that is sitting motionless, barring of course the scent. But then the wily rabbit has a few tricks for that too.
Lying down.
Rabbits don't play dead; their response to predators is to run away. If a rabbit is lying down motionless, something is wrong. It could be in shock.
Rabbits don't have "prey" because they are not carnivores, they are herbivores.
how can you make a rabbit come down
Nothing, gazelles don't make homes. At most, it'll flatten the grass a little before lying down.
Prone means lying horizontal with the face down. Pronation is the action of lying prone.