The downy woodpecker is the smallest of the three at approximately 6 inches. They are white with black wings that feature white spots. Males will have a bright red cap on the back of their head. They are highly tolerant to human activity and become quite tame. They tend to feed higher in trees but will also come down to a suet log or feeder with peanut halves or sunflower seeds.
The hairy woodpecker shares most physical traits with the downy; they are however a little larger at about 9 inches. They are easily distinguishable by their larger more developed beak. Unfortunately they are not quite as tame as their little cousins, though they will tolerate some human activity. Like the downy they prefer the suet but will feed on sunflower seeds and peanut halves.
Woodpeckers favour suet but are also quite partial to peanut halves. The ideal treat would be suet with peanuts or pieces of peanuts in it. There are several types of feeders one can use such a as a cage for a suet cake, a pin for a suet ball, or a suet log with holes to stuff the suet into.