Pastoral poetry focuses on an idealized notion of the rural landscape. This tradition started with Hesiod and we can still find traces of it in the work of Wendell Berry and Dylan Thomas.
Poems About Wild Geese
The Canadian Geese migration is one of those amazing feats of the natural world. When you think about this, and then watch them fly in their V formation, it makes sense that poets like Mary Oliver and Wendell Berry would incorporate them into their verse.