You are downloading the Sibley Birds of North America XAP file v18.104.22.168 for Windows Phone. Sibley Birds of North America is a free and useful Books & Reference app: NB: This app requires a further download of 433MB of data. WiFi highly recommended as download over Cellular data could result in data ... You can now download the offline XAP file to install & try it.
Download Locations for Sibley Birds of North America 22.214.171.124 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Sibley Birds of North America XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.