What kind of covered feeder for ground feeding birds do you suggest?

    

There are five basic types of feeders. Each is suited to certain foods and attractive to certain birds. When making a choice, look for a feeder that is made of durable materials, has few moving parts, and is easy to fill and clean.

Tray feedersMourning doves at a tray feeder.
This is simply an open platform on which you scatter a variety of foods, including seeds, nuts, fruits, and baked goods. They are used by ground feeding birds, such as juncos, doves, and sparrows, as well as many others. Having an edge or lip around the feeder will help keep the food from being kicked off onto the ground. Be sure the feeder has drain holes on the bottom so the food doesn't stay wet and get moldy. If you make your own feeder, you can use a fine mesh screen on the bottom for even better drainage. It is best to put a small amount of food out at a time, to prevent spillage and waste, and to keep it from getting covered every time it snows! You can also put a roof over the feeder, leaving the sides open, to help keep the food dry. This is often referred to as a fly-through feeder.

Here are some links to some really good sites on feeders for your ground feeding bird. ; )