Better be clear as well that an American robin and a UK robin are two different things. For UK catters, an American robin basically is a blackbird with a reddish chest. That picture looks like the colour's been touched up a bit - the ones I've seen were more reddish-brown than orange.

In our garden, the colour's mostly provided by the male chaffinches.

Graham.

PS. Disclaimer - none of these are my photos. (Wish they were!)