And yet habitat loss alone cannot explain the situation. Amphibian declines have also been reported in relatively pristine sites. A number of species have declined dramatically, particularly the Northern Leopard Frog in western Canada. Even Leopard Frogs can be very abundant where they still occur, they just aren't found in as many places as in the past. In total 17 of 45 species of Canadian salamanders, toads and frogs are known to have undergone loss of populations.
Habitat loss is likely the primary cause of all species declines in Canada.
That doesn't mean other factors aren't important, only that habitat loss is a large and ongoing problem. We may feel that because Canada is so large we don't need to worry as much, but Canada's size only means we have a larger a responsibility to take care of what we have. In addition to habitat loss there are a large number of ways we are modifying the Earth, consciously or not. All of these factors have some effect on amphibians. It is often difficult or even impossible to sort out which factor or group of factors are the most threatening to amphibians and many other organisms.