Brian Cressman shows a crowd of people a water monitor.

Brian Cressman shows a group of people a water monitor, one of the reptiles in his exhibit Sunday at the Earth Day event.

A WCC student performs in the singer-songwriter event in the Towsley Auditorium.

WCC student Colin Mercer sings and plays the acoustic guitar in the song “Loving Nature,” which he co-wrote for the 2010 Earth Day singer/songwriter event.

Casey Dewar (left) and Kaitlin Graf, from the Leslie Science and Nature Center, welcome visitors to the Earth Day event by showing them a snake.

Brian Cressman, of Huron-Clinton Metroparks, talks about reptiles at Washtenaw Community College on Earth Day.

Lisa Bashert, a beekeeper at the Ypsilanti Food Co-op, hands out plants for people to take home and talks about opportunities at the co-op.

Gillian Golembiewski and Sandy Sheldon, volunteers for Recycle Ann Arbor, display their puppet “Robi the Recycling Robot,” who is made of recycled materials, at the 40th anniversary of Earth Day.

Leanne Chadwick, of the Leslie Science and Nature Center, shows a 15-year-old great horned owl to a crowd for Earth Day.

Ann Arbor Mayor John Hieftje talks to Francie Krawcke of the Leslie Science and Nature Center at the 40th Earth Day celebration at Washtenaw Community College.