Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Superb field guide

This excellent field guide identifies western NA herps down to species level, and rather than photos (which may be misleading), it has excellent generalized pictures, with lines pointing to locations of key diagnostic features. The species accounts in the back are quite useful, and the range maps comprehensive and detailed. Absolutely a critical resource for anyone who likes to catalog animals, or has interest in identifying species.