Dammann's Garden Company – HOW TO PROVIDE WATER FOR WINTER BIRDS
Wild Profile: Meet the Northern cardinal - Cottage Life
Attracting Birds to the Winter Landscape - Alsip Home & Nursery
Bird of the Week: Northern Cardinal - Travis Audubon
How Cardinals Survive Winter & Ways You Can Help
Are Cardinals Redder in Winter? All About Birds All About Birds
Red Bird of Winter – The Northern Cardinal
How to enjoy birds this winter
Attracting Birds in Winter - Sargent's Nursery
Winter Bird Watching in Greene County - Visit Greene County
Attracting Cardinals in Winter Months
Birdscape' your yard to provide winter food, shelter to our winged friends
The Facts and Myths About Cardinal Birds – Natural History Society of Maryland