What kind of language and imagery does Hughes use to make the animals come alive

"...an eye,/ A widening deepening greenness,/ Brilliantly, concentratedly,/ Coming about its own business/ Till, with a sudden sharp hot stink of fox/ It enters the dark hole of the head."

The speaker

Towards the end of the poem, the speaker hones in on the fox's eye, likening its "widening deepening greenness" to the sudden poetic abundance the fox's image provokes. The slow, steady pace established in the first lines continues through the end of stanza 5, then rapidly accelerates, echoing the "sudden sharp hot stink of fox" which strikes the speaker as the fox is merely "Coming about its own business." By stressing the image of the eye with several adjectives and adverbs, the speaker draws out this moment, as though searching for the right combination of words to spark the poem he wishes to write. Additionally, the fox's two meanings converge in the first two lines of stanza 6: the fox is both animal and idea, entering the "dark hole" of the speaker's head.