Adult Turnover, Productivity and Nest-Tree Status of Swainson's Hawks in and Adjacent to the Snake River Birds of Prey National Conservation Area

The purpose of this study was to record mate turnover, territory occupancy, and productivity of nesting Swainson's hawks on BLM land in the northwest portion of the NCA and on BLM land adjacent to agricultural areas south of Kuna, Idaho. Adults at these nests had been previously banded and color-marked as part of a larger study aimed at documenting the turnover and productivity of pairs ofSwainson1s hawks in agricultural and exurban areas in southern Idaho. Our study also documented the current status of nest trees and threats posed by further alterations in water flows and runoff, livestock grazing, and increased frequency and intensity of range fires in the northwestern portion of the NCA.