Used this new app for two weeks birding in North Queensland and cant say enough good things about it. In addition to the obvious portablity advantages, the app provides everything in the book and a good deal more: songs and calls, photos, improved range maps color-coded for seasonal distribution, bars showing monthly abundance, a neat way to create and keep lists and notes, suggested birding sites, links to similar species, and general ease in quickly moving through the content. Its nice having the book too, but this app was the best $30 I have ever invested in a bird guide.