At least 450 avian species have been documented within the Oaks and Prairies and the Edwards Plateau. Within this changing landscape, numerous avian species have undergone precipitous declines. For instance, Northern Bobwhite populations in the Oaks and Prairies region have plummeted 4 to 8-fold in the last 25 years, while hunter harvest has dropped 4 to 9-fold during the same time period. Half of the breeding bird species in grassland habitats in Oklahoma are experiencing long-term declines. Breeding birds in shrub habitats show similar population trends. Texas, and one third of these species in Texas are experiencing long-term declines. Breeding birds in shrub habitats show similar population trends. To be effective in our conservation efforts, the OPJV currently focuses on the 27 species listed below.