Have you ever heard of "Survival of the fittest" That bird won't live for long unless you take it to a rescue rehab near you. If you leave it outside, the parents won't accept it because it had been touched by a human. It probobley was thrown out from the nest because it was too weak. You can't keep it in your house because it's illegal to take in wild animals but you can always feed it and nurse it. But sorry to tell you from experience, it might not make it to tommoraw.

Leave it where you found it, it's parents were no doubt nearby waiting to feed it. It looks like it may have just fledged and got tired. Now you've moved it there's not much hope.

You can try and bring it back to yr house and nurse it back to health , bring it to a vet to see whats wrong with it , but from experience , whats in the wild , its best to leave it and let nature take care of it on its own

Careful not to get an infection from it

Other than that is up to u

So I came back from school and found a sparrow in my garden but it was kind of laying on it's side. It's still alive and breathing but it's keeping it's eyes closed and there are no trees around here for it to have fallen from the nest. It's laying on it's side and won't keep it's head up. I don't know what to do and I don't want to leave it to die. What do I do?