Diamond Dove

I have been busy this evening researching information about this tiny little pigeon who arrived in our garden this afternoon.. It is Australian. I can only think it must be an escapee as they do not live in the UK but are bred in captivity here. It spent about an hour in the garden eating seeds and drinking water with the Sparrows. It flew off to the fields. Has anyone else ever seen one and is it possible for it to survive our cold winters is the question I ask?

Done