The Audubon Christmas Bird Count, considered by many to be the first formal citizen science program, began in 1900. Since that time, many more bird-related programs have been created. Today, the Cornell Lab of Ornithology and its partners, including Bird Studies Canada, run numerous bird counts. They also oversee eBird, a website devoted to bird sightings.
But citizen science initiatives aren’t only about birds. I recently searched for projects in Ontario, and found surveys on bumblebees, butterflies, frogs, toads, turtles, salamanders, bats, worms, and even mussels.