Reddit reviews Birds

The first book that comes to mind is:

"The Boy Who Drew Birds: A Story of John James Audubon"
Written by Jacqueline Davies, Illustrated by Melissa Sweet
Excellent story format autobiography of Audubon with beautiful illustrations. Great introduction to environmentalism as well.

Speaking of Audubon, any of the Audubon Society field guides are great to use with kids, even if they can't read the text. Ditto for the coffee table style books of his watercolors, such as "Audubon's Aviary: The Original Watercolors for The Birds of America" by Roberta Olson and The New York Historical Society. I worked at a summer camp that had a ahem fledgling bird watching program and the kids loved paging through the guides.

I'm a school librarian and all of our National Geographic Kids books, regardless of topic, are constantly checked out and on hold. They have a book about birding that looks pretty good. Birds of North America

For the little guys, I would recommend:

Charlie Harper's Count the Birds

Birds

If all else fails, you can use Angry Birds (in all its many current manifestations including the upcoming movie) as a gateway drug and angle in from there. :)

For the simple stories I like something with a bit of poetry to it. I like many of Margaret Wise Brown's books, like The Little Island, for instance. Birds is really quite lovely.

Another thing I like is a book with enough going on that I can breeze through the story in different ways, without feeling compelled to stick to the writing. How The Trollusk Got His Hat is a delightful (though out of print) example of this. I have to delve more into Mercer Mayer. I'm not that into the Little Critter books, but they kind of dominate his catalog. And why are so many out of print? Baffling.