Answer:
The topic of the poem "Auspex" is the departure of song birds.
Step-by-step explanation:
The poem "Auspex" by James Russell Lowell talks about the love that the author has for nature and how the birds represent the passion and love he feels for the land, and as they went away when winter comes, they took away their singing too, leaving only sadness and loneliness alongside the author until they came back.