Here you will find the Poem To the Snake of poet Denise Levertov
Green Snake, when I hung you round my neck and stroked your cold, pulsing throat as you hissed to me, glinting arrowy gold scales, and I felt the weight of you on my shoulders, and the whispering silver of your dryness sounded close at my ears -- Green Snake--I swore to my companions that certainly you were harmless! But truly I had no certainty, and no hope, only desiring to hold you, for that joy, which left a long wake of pleasure, as the leaves moved and you faded into the pattern of grass and shadows, and I returned smiling and haunted, to a dark morning.