Found a baby bird

[badger]

I found a tiny baby bird in the street, just lying there. Thought it was dead so picked it up, intending to put it somewhere out of the way. Couldn't see where it might have come from, no nest. Maybe taken by a crow then dropped. It's alive! But so small, eyes tight shut, tiny little wings, gaping mouth. Could be a starling, or a robin, can't tell. Doesn't seem to be injured. I've got it under a heating pad - although in this weather it hardly seems necessary - trying to give it drops of watered-down cat food, says somewhere on the net every 20 minutes for 13 hours, then it can go the night. Anyone have any experience with tiny birds?