Learn about the many species of reptiles inhabiting Tohono Chul Park at 10 a.m., every Friday, Aug. 7 through Oct. 30. The event takes place at the Overlook. Free with park admission: $7 adults; $5 seniors and active military; $3 for ages 5 to 12; and free for kids younger than 5. Call or visit www.tohonochulpark.org for more information.