Depends on what part of the US you live in.. around here they show up on their migration around January-March in Georgia. They love the berries that are on some of the Holly Trees and red tip photinia. They also really love my waterfall/stream for my pond.
I live in northeastern Pennsylvania. I have a few holly trees around my yard as well as a small mulberry tree and raspberry bush, but I've never been able to spot one. Is it true that they only travel in flocks or is it possible to just spot one or two?