I put suet out all year; the Red-bellied and Downy Woodpeckers visit the suet feeders on a daily basis almost year round. This year I've also noticed the Tufted Titmouse, Blue Jays, Mockingbirds, Red-winged Blackbirds and Grackles have all been devouring suet. We have a problem with heat here so I purchase only the no melt suet cakes and during winter I supplement with mixing up batches of peanut butter, oats, birdseed and raisins that I sometimes stuff into the suet feeders ... all the birds seem to love it.
Palm Warbler: