This riddle is about a goose! Let’s look at it step-by-step:
Line 1: 'Larger than a duck, this bird isn’t meek' means the bird is bigger than a duck and not shy or quiet.
Line 2: 'When in a bad mood, it pinches with its beak' tells us that if this bird is upset, it uses its beak to nip or pinch.
So, the answer is a goose because geese are bigger than ducks and can be grumpy and pinch with their beaks!