Lawrence's "Bats" is a dramatic monologue. A dramatic monologue is a type of poem in which a single speaker, who is not the poet, addresses an audience or a particular listener. The speaker reveals their character and personal thoughts through their speech. This literary form provides insight into the speaker’s mind and intentions.
In "Bats," the speaker describes their personal feelings and reflections upon witnessing bats in the evening, revealing a lot about their emotions and perspectives. The poem is focused on the speaker's view and this introspective element is characteristic of a dramatic monologue.