You are downloading the WinObs XAP file v188.8.131.52 for Windows Phone. WinObs is a free and useful Lifestyle app: WinObs is an application that can be used worldwide for entering and uploading observations of birds, mammals, plants, etc. directly from the field. ... You can now download the offline XAP file to install & try it.
Download Locations for WinObs 184.108.40.206 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline WinObs XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.