… cattle in preserving the native temperate grasslands, Canada’s only endangered ecosystem … . Canadian cattle farmers and ranchers care for 35 million acres of native … Guyn of Ducks Unlimited Canada said, “Canada’s grasslands are complex ecosystems …… cattle in preserving the native temperate grasslands, Canada’s only endangered ecosystem … . Canadian cattle farmers and ranchers care for 35 million acres of native … Guyn of Ducks Unlimited Canada said, “Canada’s grasslands are complex ecosystems …