on March 21, 2011
Not a bad ID book, but you can no longer rely on this book alone because it starts getting pretty outdated. For instance, it still refers to "Lesser Golden-plover", a species that was split in 1986. Another example: it says the Hawaiian goose is only found on the islands of Big Island and Maui, while it's on Kaua'i that it is most easily spotted these days. So you need another, less outdated source of information as well.
Other problems of this book: some species are not illustrated, there are no color maps, and sometimes the descriptions next to the color plates are clearly unsufficient (but you can always find more details in the black & white text pages that make more than 80% of the book's volume).
That said, it is not a bad book! It seems to cover all species, the color plates are usually good and there's a lot to learn from the text section. It is never bad to have this book with you, but if you're there for visiting Hawai'i in general and not doing an intense birding-oriented trip, then keep in mind that you could also spend three times less for a smaller and more up-to-date book with nice pictures and even tips on where to find the birds... which definitely won't have ALL the species, but most of them. Yours to decide!
on March 18, 2010
I used this on a recent short trip to Kauai, my first, and found it very helpful. It works best for someone who wants more detail than the field identification guides, though I would recommend getting both types of guides if you have more than a casual interest in the birds of the area.