Nature Explorer for Windows is an all-around nature identification program with all 10 nature topics built into the download installer.
10 European topics: Birds, Butterflies, Insects, Mammals, Fungi, Wild Flowers, Reptiles, Trees, Rocks, and Fossils.
The Windows desktop version has all nature topics included
FREE Nature Explorer App for Windows
The Android 4+ version allows you to choose which topic/s to download and use
Instructions on installing the app on your phone or tablet
Android 4+ version for phone or tablet
Windows version has all topics included.