Opened my flat door and he flew in... I have put notices up and facebooked, I haven't got a Twitter account. He has good and water and my lounge to fly around in but he won't shut up!
Canaries usually have box like cage with a wire front. Maybe if he decides to stay around you could put a cardboard box or an old drawer on its side with his food in ,just to help him settle .
All done, cage improvised I removed the top shelves from a book case fitted a wire mesh front, sand sheets, grit, seed, water and cuttlebone, selection of perches.... not ringed, he seems quite happy....