The puma is, with the exception of some monkeys, the most playful animal in existence.

He spent his youth studying the local flora and fauna and observing both natural and human dramas on what was then a lawless frontier publishing his ornithological work in Proceedings of the Royal Zoological Society initially in an English mingled with Spanish idioms. Ernest Hemingway famously referred to Hudson's book The Purple Land in his novel The Sun Also Rises. Hudson settled in England during 1874.

William Henry Hudson (4 August 1841 – 18 August 1922) was an author naturalist and ornithologist.