eMammal is a system for collecting, storing, and sharing camera trap data. The system is designed for scientists and citizen scientists, and anyone who wants to join in the fun and discovery of camera trapping. Citizen volunteers place “camera traps”, infrared activated cameras, across the landscape in parks and other natural areas to collect photos of mammals. The camera trappers then use our custom-made software to look at pictures, identify animals, and upload them to the Smithsonian Data Repository for review and storage. These data help researchers answer questions about mammal distribution and abundance and use this information for conservation. Plus, they provide a unique view into the hidden world of wildlife. For a fun animal ID game using eMammal favorites, click on eMammal Lite for more! To see more camera trap photos from eMammal volunteers and find out what is going on with the project visit our Facebook page http://www.facebook.com/emammal.