This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Handbook of birds of the western United States Pl. II . ss VHH dotted parts of the Sonoran Zones cast of the Gnat Plains indicate the western limit of the humid dh'iatons or 'these Zones LIFE ZONES BY HART MERRIAM Pl II Illustration biodiversitylibrary org title Bailey Florence Merriam Biodiversity Heritage Library