Lesser Prairie-Chicken (Tympanuchus pallidicinctus) populations have experienced dramatic rangewide declines (up to 92%) since settlement of the Great Plains, This decline has been attributed to changes in land-use practices, such as conversion of native rangelands to intensive agriculture and increased grazing pressure. These changes may increase the impact of interspecific competition on populations. We documented disturbance of lekking Lesser Prairie-Chickens by Ring-necked Pheasants (Phasianus colchicus). Future management and research should take into account possible impacts to Lesser Prairie-Chickens during the breeding season.