Why Hanuman has monkey face?

Why Hanuman has monkey face? Here is a tale about the monkey god as a baby. Hanuman was the son of Vayu, the god of the wind, and Anjana, a celestial nymph. You're probably wondering how the son of the wind god and a nymph turned out to be a monkey. The answer is that Anjana once angered a sage who cursed her to be born as a monkey