What is Anaxyrus boreas? Why the Western toad is now considered Canada’s most genetically distinct animal

Western toad, scientifically known as Anaxyrus boreas, is a species of toad found across parts of western North America, including Canada. Researchers recently identified it as Canada’s most genetically distinct animal, meaning its genetic makeup is unusually different from many other species in the country. Scientists believe this uniqueness developed over long periods of isolation and adaptation to specific environments. The discovery is important because genetically distinct species can provide valuable information about evolution, biodiversity, and conservation efforts aimed at protecting wildlife for future generations.

Canada is known for wildlife such as beavers and moose, but researchers have now identified a surprising animal with a uniquely Canadian genetic identity. A new study from researchers at the University of Ottawa found a genetically distinct population of the Western toad, a discovery that could reshape conservation efforts in the country.

The research, published in Diversity and Distributions, as quoted by PHYS.ORG, examined the genetics of western toads found across North America, especially in Alberta and British Columbia. To understand the relationships between different populations, lead researcher Jayna Bergman and her team collected samples from toads and tadpoles in ponds, lakes, and wetlands. They then analyzed DNA patterns to measure how closely related different populations were.


The findings showed that western toads previously identified as 'Calling' and 'Non-calling' populations are not simply behaviorally different. Researchers discovered that they also carry important genetic differences. Over long periods, isolated populations slowly develop changes in their DNA, allowing scientists to identify separate genetic groups.

"Our findings of a genetically distinct group entirely contained to a Canadian province is very unusual. These genetic results suggest we should be doing more to protect this species, especially the Alberta population of the western toad because of its unique complement of the species' total genetic diversity," says Bergman.

Researchers noted an interesting difference between these populations. Western toads east of the Canadian Rocky Mountains have vocal sacs that allow them to produce mating calls, while populations west of the Rockies and farther south generally do not.

"This 'advertisement call' provides a notable difference in breeding strategies and may be the only example of such an extreme difference in calls within what are considered the same species," explained Assistant Professor Julie Lee-Yaw.

Researchers believe modern genetic technology is helping uncover hidden biodiversity that older methods may have missed, offering important new insights for conservation and future wildlife protection efforts.