This poem is an attempt by Oliver to inspire people to be true to themselves and nature rather than run a never-ending race to be perfect for people. And that “you” are not alone with a life full of despair. There are millions, and you will definitely find someone to share it with. You just need some patience. This is also and attempts by the poet to promote human connectivity.
Pigeon is hugely considered as a wise and saintly bird, whereas crows are often considered cranky and wicked. Most people love pigeon more than a crow. But the poet here feels the opposite. This poem describes the writer’s feelings for both the birds.