HOME | DD

Description
Like most other waterfowl, yellow-billed ducks undergo a molting process in which they lose all flight feathers at one time leaving them flightless for three to four weeks. This leaves them especially vulnerable to predators and makes foraging difficult. Yellow-billed ducks lose considerable (about a quarter) body mass during the first half of molting.

Description
Like most other waterfowl, yellow-billed ducks undergo a molting process in which they lose all flight feathers at one time leaving them flightless for three to four weeks. This leaves them especially vulnerable to predators and makes foraging difficult. Yellow-billed ducks lose considerable (about a quarter) body mass during the first half of molting.