Across a growing swath of North America, these animals are dying from a mysterious disorder called chronic wasting disease. It’s caused not by a virus or bacterium, but a deformed protein called a prion.
Winter rain makes it more difficult for the animals to feed, particularly pregnant females, researchers found.
Lake Ontario and St. Lawrence River water levels are expected to stay above average into the spring, following record levels last year that led to extreme flooding in Central Canada.
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