Sick Sparrow?

[2dogs2000]

This little chap has been hanging around for almost 2 days now. He can fly, he is eating and drinking, but looks all fluffed up. He was sitting on the lawn and I could get up to 3 feet away before he moved. He hid under my shed and I put seed and water out for him and he came and ate and drank in front of me. Today he has been hopping about under the feeders or sitting on the bird bath. When the other sparrows come he just carries on and when they leave he stays.
Any ideas on what might be wrong with him? Is it an illness? If so what about the other sparrows? The only other idea I could come up with was old age. (Which happens to us all.)

[Wild-Woman]

Looks like a young one to me. Doesn't look at all well does he. I wonder if he's had an argument with a window and has just knocked himself badly. Hope he recovers.

[mrs fish]

He looks like he has some ticks on him so he he must be in a bad way not to preen his-self, I hope a cat doesn't get him

[ellen h]

Poor little fella,he may be just old,certainly looks a bit careworn....
ellen

[Jason Green]

The burgandy cap suggests a young male, poor thing. It may have fallen out/left the nest too early.