… [S]everal wildlife agencies have emphasized late-summer programs that pay farmers to convert fallow and recently-harvested farmland into shallow-water habitat for the dwindling shorebird species that migrate along the Pacific Flyway through the Central Valley in July, August and September. Through a farmland program run through BirdReturns — a partnership among the Nature Conservancy, Audubon California and Point Blue Conservation Science — stakeholders have emphasized the late-summer time frame and shorebirds, which migrate as early as July, months before other species and the majority of birds trek to their winter homes.