The features that make the Sibley app worthwhile in the field - comparison, lots of drawings and the quick search feature - are still there, but Im disappointed that this update didnt capture all the recent changes approved by the AOU and the ABA (the "whats new" statement does include a couple of splits, but not all changes).
The birds are in old taxonomic order (Loons, Grebes, Albatrosses, etc.) instead of the newer order (Ducks/Geese, Chachalaca, Quail, etc., with Falcons/Parrots following Woodpeckers). Also, several birds that appear in the U.S. are not in this app - four are missing for my life list.
The first time I wrote to the app publisher I was told that the app follows the book, so if a bird was not in the book, then it wasnt in the app. However, the app publishers have the ability to be more current and relevant than the printed product, which is more costly and time-intensive to create (but which I will still purchase when it is released).
National Geographic, a similar app with book ties, has placed the birds in current tax order ahead of the printed version, and NatGeo has all the birds seen in North America, including Sungrebe and Sinaloa Wren. The latest Audubon version hasnt updated to the 2012 tax order but is still newer than the Sibley app.
Please take the time to make this more current.
cfischer24 about The Sibley eGuide, v1.8