Sixteen living books you fill one photograph at a time. Choose a free collection and explore its living pages.
The resourceful creatures thriving in cities and suburbs.
A set brings species together around a shared theme. Find each one in the wild to complete the collection.
Completion badge: City Naturalist
A slim, adaptable fox whose white-tipped tail is often the quickest field mark.
Two kinds of book to fill. Ecosystem chains connect a habitat from producer to predator. Species sets gather a shared theme, such as a habitat, a kind of animal, or a time of day.
Photograph and identify a species to fill its place across your collections and save the moment in your journal.