Departing visitors

Seeing small groups of Fieldfares moving in a northerly direction I suppose the start of their journey to to breed in Scandinavia?Goldcrests reappeared in our garden about 10 days ago, I had missed hearing them all winter. However did they survive? One Saturday last October I was watching Swallows flying southwards on the start of their migration and Fieldfares arriving at the end of theirs.