Is this normal - we appear to have a single fledgling House Sparrow eating, and resting in our garden. No apparent adult involvement. Been here 2/3 days - not left the garden!
I doubt very much it is a fledgling..probably more like a sick adult am afraid :-(
POST EDIT
you can read more about disease found in our garden birds in the link below
www.bto.org/.../disease-birds
(Pardon the Scottish Accent)