Naturalist Liz Wickard, with the city of Aurora, helps clip bacon to Juli VandeVeegate's (center) crawdad catcher, July 17 at the Aurora Reservoir. More than 15 kids showed up to Wickard's class to learn about crayfish and then walked down to the water to try to catch the freshwater crustaceans. (Marla R. Keown/Aurora Sentinel)