https://www.usgs.gov/publications/body-mass-changes-dabbling-and-diving-ducks-wintering-california
Bird body mass is often used as an index of body condition and fluctuates throughout the year in response to environmental conditions and avian life-history...
body massdiving duckschangesdabblingwintering
https://www.usgs.gov/publications/habitat-selection-postbreeding-female-diving-ducks-influence-habitat-attributes-and
Habitat selection studies of postbreeding waterfowl have rarely focused on within-wetland attributes such as water depth, escape cover, and food availability....
diving duckshabitatselectionfemaleinfluence