Answer:
The signature stroll of ducks and penguins.
What creature starts yellow inside and white outside, then becomes its first five before becoming the whole?
What build its house with earthen string and ensnares its prey with a biting sting?
He is not the skinniest of felines.
What has no arms, hands, or legs but moves the earth?
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?