As the journey progressed, Darwin noted some obvious changes in himself. He used to find almost any kind of work boring, but now he could labor all hours of the day; in fact, with so much to explore and learn, he hated wasting a single minute of the voyage. He had cultivated an incredible eye for the flora and fauna of South America. He could identify local birds by their songs, the markings on their eggs, their manner of taking flight. All of this information he could catalog and organize in an efficient manner.
