No 2nd Saturday Program for April. Instead on April 27th, 2019, from 10:00am to 12:00pm, Heron Haven will once again be participating in the City Nature Challenge, in cooperation with Mulhal's Nursery and the Omaha Henry Doorly Zoo. If you would like to become a member of "Friends of Heron Haven" please bring $25.00 cash or check. The first 25 new members will receive the award winning The Nature Connection by Clare Walker Leslie. See below for more information on the city challenge.