A lonely visitor

Good morning all. 

I have a lonely pigeon who has appeared in my garden the last two days. It doesn't appear to be a racing pigeon, and it had beautiful markings.

I'm curious though, as I'm only ever used to seeing pigeons like this in flocks, usually trying to get the crumbs of whatever flaky pastry I may be eating.

Is this normal for a pigeon to be so lonesome?

T.I.A Suzie.