Bull Moose Algonquin

Since the 1990s, moose populations have declined dramatically in much of temperate North America, although they remain stable in arctic and subarctic regions. The exact cause of the die-off is not determined, but appears to be a combination of factors, including a change in habitat and heat stress caused by global warming,and the northward migration of warmer-weather parasites to which moose have not developed a natural defense, such as liver flukes, brain worms and winter tick infestations.