Many agricultural lands also serve as habitat for threatened or endangered species. In fact, many listed species in this region depend on agriculture since they have adapted to those practices over the last 100 years. Where land cannot be set aside in fee title, Habitat Conservation Plans, Natural Communities Conservation Plans, and other preservation efforts rely on conservation easements, transfer of development rights (TDR), or Williamson Act contracts to protect land for habitat or agriculture. The Sacramento Area Flood Control Agency (SAFCA) has also begun to implement a program to purchase farmland conservation easement in Sutter and Yolo counties as part of their flood management plan. Maintaining the land in farming reduces the amount of potential development in the floodplain and hence, flood risk. Some easement or TDR programs make a lump sum payment, but recently farmers and ranchers have shown more interest in participating if they instead receive annual payments. These easements not only preserve a resource, they provide an income stream for land owners. A couple examples of these multipurpose opportunities include field crops, such as alfalfa or wheat, which provide Swainson's Hawk habitat, and cattle grazing in vernal pool areas, which keeps non-native grasses in check.