It's small, able to fly short distances but not able to get elevation. It might not be long before it's big enough to fly properly.
Will it eat? Drink? Currently it's in a box with a wire mesh top I've put over it.
The thing will be cat food if I let it outside and there's no way it can get back to its nest.
It's cheaping trying to call for mom but there's no answer.
My thinking is like.. Water, seed (we have a parrot so I have seed)... Hoping it can feed itself or it's probably done for? If it can survive a few days to a week with me then it might get big enough to leave?
If it's one of those it's a House Sparrow or some sort of Tit. I think it's probably a Sparrow.