First of all, let me stress to potential buyers that this book is NOT a field guide. It is however a rather thourough reference book. The authors describe what kind of habitat the birds breed in, what the nests look like, the eggs, incubation, the nestlings, and nestling period. They also tell when the breeding season is. There are very, very few drawings of nests. There are sixteen pages of color plates showing paintings of nestlings. And another forty-seven pages of color plates showing photos of eggs. The smaller eggs are shown actual size, but the larger eggs are shown 3/4's or 9/10's of actual size. Why not go ahead and make them actual size even if it means adding a few more pages? I think this book is a good companion to the Peterson guides to bird nests (where you will see actual bird nests with eggs.) It would be great if David Allen Sibley would write or at least illustrate the ultimate guide to bird nests.