The use of constructed wetland treatment systems (WTS) for treating municipal wastewater is increasing in the United States, but little documentation exists concerning the ability of these systems to duplicate or sustain wetland functions. A pilot study was designed primarily to examine methods and the usefulness of various wetland indicators for assessing wildlife habitat as a wetland function. The study took place at six WTS sites throughout the United States. The report focusses on two of those sites in Florida, one near Orlando and one near Lakeland. Data for vegetation, macroinvertebrate, site morphology, water quality, and bird use were collected in the field or compiled from various existing data sets. Wildlife habitat quality was assessed mainly with respect to bird habitat.