Canada’s prairie country always seems barren to me, as though something is missing and the ecosystem is incomplete. Probably because it is. For tens of thousands of years, as many as 30 million bison formed the cornerstone of a complex ecosystem, which dominated the Great Plains. In 1890, bison were perilously close to extinction, with less than 1,000 animals scattered across the continent. Today, largely due to conservation efforts by Parks Canada, bison thrive in parks and private herds, worldwide.