Are fieldfares not usually in flocks?
Depends, if you’re out in the country, you’ll mostly see them in flocks, along with redwings, but if they come into urban areas, they seem to split up; last time I saw them around, there were two or three on my hedge out front after the berries, which was driving the blackbirds nuts, the fieldfares didn’t give a toss! But then, they’re about half as big again in size, redwings are closer to blackbirds and thrushes in size. They’re all various species of thrush anyway. I think they tend to spread out a lot more in towns, there’s never really enough food in one location for a whole flock, so they split up.