Yes, I believe the mood of the speaker in Thomas Hardy's "The Darkling Thrush" does change because of the thrush's song. At the beginning of the poem, the speaker describes a bleak winter landscape filled with desolation and uncertainty. However, when the thrush starts singing, the speaker's mood begins to shift. The song of the thrush conveys a sense of hope and renewal, breaking through the darkness and despair of the winter landscape. The speaker's tone becomes more hopeful and optimistic as he is able to find beauty and vitality in the midst of the bleakness. The thrush’s song acts as a contrast to the despair of the speaker, providing a sense of optimism and rejuvenation. (4 points)