Katydid on purple prairie clover (Dalea purpurea). TNC’s Platte River Prairies. Published November 25, 2019 at 1261 × 838 in Katydid on purple prairie clover (Dalea purpurea). TNC’s Platte River Prairies. Katydid on purple prairie clover (Dalea purpurea). TNC’s Platte River Prairies.