The two books I relied on were, firstly, Dave Gosney’s book ““Finding Birds in Mallorca” (which comes with a DVD of the sites in the book and some of the birds you can see at them and, secondly, “A Birding Tourist’s Guide to Majorca” by Maties Rebassa et al, which is a more recent book, more colourful and a good companion to the Gosney book, but it does not replace it.