in Thoreau’s Journal:
When I think what were the various sounds and notes, the migrations and works, and changes of fur and plumage which ushered in the spring and marked the other seasons of the year,
I am reminded that this my life in nature, this particular round of natural phenomena which I call a year, is lamentably incomplete.
I listen to [a] concert in which so many parts are wanting. The whole civilized country is to some extent turned into a city, and I am that citizen whom I pity. Many of those animal migrations and other phenomena by which the Indians marked the season are no longer to be observed.
I seek acquaintance with Nature, ––to know her moods and manners.