Check out Project Noah: According to Jill Priluck’s article in Slate, it is “a database of spottings, a field guide, and a repository for ecology surveys.” You could spend all day viewing the massive collections.

Project NOAH has found the sweet spot between professional scientists and casual naturalists. It began as an app for people to share their nature sightings but has evolved into a scientific and culturally relevant tool for both the masses and the experts. Project NOAH functions as a kind of Foursquare for flora and fauna, a way for amateur nature spotters to record the bugs, leaves, and birds they’ve found. Those data, in turn, have become a valuable tool for professional researchers.

The good news? “The platform is about to go global with a cross-media blitz, in hopes of turning wildlife spotting into a cultural sport.”