Top ten natural histories

Caspar Henderson is a writer and journalist whose work has appeared in the Financial Times, the Independent, and New Scientist. His The Book of Barely Imagined Beings: A 21st Century Bestiary is due out in the US in 2013 from the University of Chicago Press.

One of his top ten natural histories, as told to the Guardian:
Arctic Dreams by Barry Lopez (1984)

It's taken until the last slot to get