Monster?

Riddle: What walks on four feet in the morning, two in the afternoon and three at night?

Answer: Man: as an infant, he crawls on all fours; as an adult, he walks on two legs and; in old age, he uses a 'walking' stick.

Source: https://www.riddles.com/index.php/5532

What walks on four feet in the morning, two in the afternoon and three at night? — Monster? by Danni v1.

Riddle: What walks on four feet in the morning, two in the afternoon and three at night? Answer: Man: as an infant, he crawls on all fours; as an adult, he walks on two legs and; in old age, he uses a 'walking' stick. — by Danni v2.