Bird supply stores are one of the best places to look. You may want to learn how to build your own houses and feeders. Food, water and shelter are neccessary for bird survival. Different birds like different food. If you want to attract a certain bird to your yard just put out it's favorite food.
Woodpeckers enjoy suet, which can be placed in a hanging wire container or mesh bag.
Chickadees and wrens like small grain. The cardinals seem to enjoy sunflower seeds. Birds also need water. They drink it and bathe in it. Remember to put their food and water source in a place where there is protection from their predators.