40 Common Birds of the United States for Beginners

Forty Common Birds of the United States for Beginners. The suggested lists of forty common species for the east coast, mid west and west coast. You'll have to adjust them for your locale. Most are commonly seen, but some are also chosen to illustrate different families or easy to recognize calls. You'll have to tweak them for the season or specific habit in which you'll run the class.

111 kind of birds, more than 950 pictures.

This app only contain the zip files of Wikipedia data. You need download the Wikipedia Offline Reader Lite to read the data. You can install the free version app from following URL :
https://play.google.com/store/apps/details?id=com.nlrp.wikiofflinereaderlite

The data this app uses all come from Wikipedia. Most of the text and pictures of Wikipedia are published with non-commercial Creative Commons License, and according to this license, the derivative works cannot be used for commercial purpose, so the pictures and texts of this app can be downloaded for free.

But the offline reader which will read the data is not free. so the app and the data is provided separately, the user need to download both of them and then they can use it.

You can purchase the full paid version at the following URL :
https://play.google.com/store/apps/details?id=com.nlrp.wikiofflinereader