To Autumn Mortality Quotes

How we cite our quotes: (line)

Quote #4

And full-grown lambs loud bleat from hilly bourn;
Hedge-crickets sing; and now with treble soft
The redbreast whistles from a garden-croft,
And gathering swallows twitter in the skies. (lines 30-33)

How does the end of the poem relate to the earlier hints of mortality? Do these animals continue the song of mourning, or does this song evolve into something that cannot be understood on human terms? Maybe these animals, like the bees, have no knowledge or concern for when the season will end.