Thurber uses this humorous scenario to highlight how language and perception can be subjective and sometimes lead to misunderstandings. The wife's insistence on calling the bird a "catbird" reflects her perspective and beliefs, regardless of the objective truth. The story highlights the challenge of conveying precise information, especially when dealing with complex concepts or situations.
Moreover, Thurber explores the role of language in shaping our experiences. The way the wife refers to the bird influences how both she and her husband perceive it. Thurber emphasizes the power of language to influence our thoughts, emotions, and behaviors, even when detached from objective reality.
Ultimately, "Catbird" serves as a lighthearted examination of the complexities of human communication and the subjective nature of language and perception.