The masculine gender of 'hen' is 'rooster'. In English, many nouns have gender-specific forms. For birds, 'hen' refers to the female, while 'rooster' is the male counterpart.
To show possession using 's in the sentence 'The wing of the bird got stuck in the wire,' you would rewrite it as: 'The bird's wing got stuck in the wire.'
This change shows that the wing belongs to the bird by adding 's to 'bird', making it clear whose wing it is.