Question: What type of duck is a yellow duckling?
Disambiguated questions and answers: question: What type of duckling is yellow with streaks by the eyes?
What type of duckling is yellow with buff-brown markings on the tail and wings?
What type of duckling is yellow with an orange beak?
answer: Mallard
C. moschata
Musovy duck
American Pekin
Natural Questions answer: mallards (from the Wikipedia article "Mallard")