Let's think about the clues in the riddle:
- The bird is larger than a duck.
- It can be grumpy and pinch with its beak.
- It rhymes and mentions 'goose' in its theme.
The bird the riddle is talking about is a goose! Geese are bigger than ducks, and when they're upset, they can peck or pinch you gently with their beak.
Here's the riddle again for you:
Larger than a duck, this bird isn’t meek:
When in a bad mood, it pinches with its beak.
So, the answer is: goose!