Some say offering food to bluebirds could make the difference between them surviving long, harsh winter temperatures. 

We have information on both mealworms (available locally at The Bluebird Shed and Orscheln), and bluebird pudding that you can make, on our FAQ page (see Feeding Bluebirds)

If you google bluebird pudding you'll find scads of recipes.  They also eat suet.

Thank you for helping the bluebirds