The Hornsby Bend Bird Observatory is located at the Austin Water Utility's Hornsby Bend Biosolids Management Plant. It is hosted by the Austin Water Utility's Center for Environmental Research at Hornsby Bend. More than 350 birds have been recorded here. The complex consists of 4 lagoons, woods along the Colorado River, and fields. There are monthly bird walks, volunteer work, and bird counts at the Education Center. Be prepared for unpleasant odors during the summer.