If you are an avid wild bird feeder and watcher like I am, you want to attract as many different kinds of wild birds as possible to your yard. One of the key ways to accomplish that is by using a variety of wild bird feeders. Different birds have different feeding styles and preferences.
The most common feeder would be a tube feeder. These are cylindrical tubes that have a variety of feeding ports which allow many birds to feed at once. The smaller perches discourage larger birds from landing, scaring away the smaller birds and hogging all the bird seed. Tube feeders attract finches, nuthatches, grosbeaks and chickadees. I personally like feeders that feature a shield which slides in front of the seed ports when a heavier bird or squirrel gets on the feeder.
Suet feeders attract a variety of cling feeders, such as woodpeckers, wrens, nuthatches, and chickadees. Suet feeders are basically a wire cage to hold a suet block, allowing the birds to pick off small pieces. Birds convert the fat into needed energy all winter long and in the warmer months use it to store fat for their upcoming winter migration.
Nectar feeders attract hummingbirds and orioles during the warmer months of the year. Make sure you change the bird nectar regularly to keep it from spoiling. I put my nectar feeders out in late March or early April depending upon temperature. I want the feeders in place when the birds arrive back in my area so my yard remains part of their feeding area.
Bird watching is a very enjoyable pastime, and having a variety of feeders set-up throughout your yard will attract quite the collection of birds. I currently have different three seed feeders and one suet feeder all visible from my backyard window. My wife and I are always grabbing our bird books to identify yet another type of bird that has discovered our backyard. For nothing else but the pure enjoyment of attracting and watching the largest variety of birds possible I cannot encourage you more to add many different bird feeders to your yard.