In “Written in March,” we see Wordsworth once again reveling in the joy and beauty of nature. As the title suggests, the poem is set in March, right at the beginning of spring. It's been a long cold winter, but nature is finally bursting into life once more.
In the very first line, the cock is crowing, heralding the arrival of spring and all the new life associated with it. The stream is flowing, joyously free from all the ice that covered it during winter. And the small birds twitter, happy that spring has now at long last arrived.
The exuberance with which the speaker greets the arrival of spring cannot but help to make us feel that the onset of the new season brings him great joy. Such joy is also manifested in his gladness at the end of winter, which he compares to the defeat of an army. Wordsworth expands the military metaphor by saying that the snow has retreated.
Everyone and everything seems happy now that spring is here. And one gets the strong impression that it's not just the ploughboy who's whooping with delight but the speaker himself, sharing as he does the “joy of the mountains,” the unalloyed happiness that pervades the springtime landscape.