The nest

It was a month long summer vacation, I had returned my home unwillingly, And I was shocked to see my bedroom too, Twigs and bird's drops were scattered everywhere, I did not know how they come exactly, Finally I had found a small bird's nest , . Oh ,it was inside an exhaust fan's frame, The little chicks were peeped out of the nest, They expected their mother's arrival, There was no sign of their mother's chirping, I waited for an hour in the same room, At last their mother came with a calling, It had a tiny crumb in its compact beak, . And it fed it a chick and flew away.