If you are any kind of birder and are more interested in a bird other than simple identification, this is an excellent book. It's compact, yet goes into detail about bird identification - detailing habitat, feeding habits, and reproduction - including such details as what type of nest, where, how many babies, who broods, and how many days from hatching to fledging for every North American species. A great behavior book, and on every opposite page it includes in depth essays on a variety of subjects from nest parasitism to noteworthy biologists. I use this in sync with Sibley's Guide almost every time. Highly recommend.