Wintering Waterfowl Monitoring - Central Valley - 1955-2022
The Waterfowl Program annually monitors wintering waterfowl (ducks, cranes and coots) in the Central Valley, along with US FWS partners, using fixed-wing aircraft, 1955 to current.

Data are collected from fixed-wing aircraft with 2 observers in each. The survey is conducted the first full week in January, weather …