Crossing The Water Poem by Sylvia Plath

I've found that sylvia plath makes many references to rooks in her works, and tried to figure out the signifigance. For those who were curious as well, here it is - Crow/Rook: Crows and rooks symbolize resourcefulness, survival, death, a call to the magick and the mystery around us, the law, the supernatural, the mysteries of creation, shape-shifting, change, harmony, justice, integrity, bad omens, boldness, skill, cunning, prophecy, eloquence and divination. They are tricksters connected to Morrigan, Varuna, Rhea Kronia, Apollo, Macha and Babd.