USDA Forest Service:
1974. Monitoring wildlife for DDT effects. OR/WA/ID Douglas-fir tussock moth control project.
USDA Forest Service:
1974. Monitoring bird populations for DDT effects. OR/WA/ID Douglas-fir tussock moth control project.
USDA Forest Service:
1974. Bird house to monitor bird populations for DDT effects. OR/WA/ID Douglas-fir tussock moth control project.
USDA Forest Service:
1974. Bird house to monitor bird populations for DDT effects. OR/WA/ID Douglas-fir tussock moth control project.
USDA Forest Service:
1974. Baby birds in a nest. Bird house used to monitor bird populations for DDT effects. OR/WA/ID Douglas-fir tussock moth control project.
USDA Forest Service:
1974. Monitoring bird populations for DDT effects. OR/WA/ID Douglas-fir tussock moth control project.
USDA Forest Service:
1974. Baby bird hatched in the spray project area. Monitoring bird populations for DDT effects. OR/WA/ID Douglas-fir tussock moth control project.