Tucson artist and landscape designer Greg Corman discusses the importance of native bees and shares tips on how to make nesting habitats for them, from 10 a.m. to noon, Saturday, March 3; $8, $6 senior, $5 active military, $4 student with valid ID, $2 ages 5 through 12, free member or child younger than 5, includes admission to the park. Visit tohonochulpark.org for more information.