Rare Birds of North America is the only extensive treatment I've see of the so called "vagrant birds" in the US and Canada. Most, or at least many, traditional bird books have a section in the back for rare birds, occasionals or accidentals, which one might see now and then. But when you think about it, how can five or even a dozen species in a bird book really do justice to the problem of spotting birds that are normally not supposed to be spotted?
I'm reminded of one South African bird guide that has a half dozen penguin species listed in it. There is only one species of penguin in South Africa but a handful of others have shown up, almost always as a corpse floating around with other junk on the beach somewhere. I suppose when we're talking penguins, that counts.
Anyway, Rare Birds of North America by Steve Howell, Ian Lewington and Will Russell includes 262 species illustrated across 275 plates, from the Old World, the New World Tropics, and the planet's oceans. The first 44 pages or so are about rare birds, and the rest of the book is a morphologically-grouped compendium of the species. The species discussion run from page to page (unlike a typical modern guide). They include common name, binomial, basic size stats, then info on taxonomy, rarity, normal distribution, and as appropriate, subspecies Most of the plates have multiple illustrations showing various angles and flight vs. non-flight, sex-specirc, and other views. The illustrations are drawings and as far as I can tell are good quality. But since you never see these birds who the heck knows!?!?
An appendix includes brand new rare species not covered in the book. A second appendix includes species that may or may not have occurred. A third appendix lists the "birds new to North America" by year. This appendix and various data presented at the beginning of the book are analyzed in the work, but seem ripe for further Science by Spreadsheet!
This is a Hefty, thick-leaved, well made book (I reviewed the hardcover). Not a field guide but not a big coffee table book either. More like the bird-book-shelf and truck of the car style book.
Steve N. G. Howell is research associate at PRBO Conservation Science and is affiliated with WINGS, an international bird tour company. Hew wrote Petrels, Albatrosses, and Storm-Petrels of North America. Ian Lewington a bird illustrator famous for the high quality of his work. Will Russell is cofounder and managing director of WINGS.
I remember a couple of years ago I saw a Lazuli Bunting in my back yard - we are at the absolute furthest north occasional range - it was a marvelous sight. Unfortunately the picture I got was very small and blurry when blown up (didn't have my dslr with me.) I expect with climate change I'll see more of them as their range moves north - .