Keeping toads safe on the roads

By Pamela Rutherford, Alyssa Eagle, and Shawna Philpott
May 2017
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What you need to know

We are studying the effects of roads on amphibian and reptile populations in southwestern Manitoba. Of all ecosystems, wetlands are the most impacted by roads because roads destroy wetland habitat and/or force animals to move across roads to access wetlands for breeding and foraging during spring and fall migration periods. Unfortunately, there are many reports of roads being completely covered with dead animals during spring and fall migration periods. Our research will help identify these areas in Manitoba and work with Manitoba Infrastructure to implement strategies to mitigate these effects.

Why this research is important

This research is important because we can identify regions or ‘hotspots’ in Manitoba where there is high mortality and/or high impacts on roadside wetlands. We are focusing our efforts on four species that are of conservation concern because of their declining populations: (1) Great Plains Toad, (2) Northern Leopard Frog, (3) Common Snapping Turtle, and (4) Western Tiger Salamander. Amphibians and reptiles are considered one of the most at-risk groups of animals, and unfortunately, many populations continue to decline due to loss of habitat, climate change, and other impacts by humans.

How the research is being done

For this this research study we monitor amphibian and reptile activity along roads in southwestern Manitoba. We conduct breeding surveys in the spring by working at night and recording any males that are calling (each species has a unique call and males call to attract a mate). We also collect data on animals that are found on the roads (either dead or alive) and in the roadside ponds. In addition, we collect information on the water quality of the roadside ponds to determine if they are healthy habitats for all plants and animals. We also use data from the Manitoba Herp Atlas and ArcGIS (geographic information system for working with maps and geographic information) to determine ‘hotspots’ of activity for reptiles and amphibians throughout Manitoba.

What the researchers found

To date, we have located two ‘hotspots’ of activity along roads in Manitoba: (1) around Melita in southwestern Manitoba and (2) around Tolstoi in southeastern Manitoba. These ‘hotspots’ include three of the species that are of conservation concern: (1) Northern Leopard Frog, (2) Great Plains Toad and (3) Western Tiger Salamander. We are continuing the research this summer, with the assistance of Manitoba Infrastructure, and will be conducting detailed analyses of wetlands in these regions.

How this research can be used

Using this information we can work with Manitoba Infrastructure to implement strategies to mitigate these effects that can be used throughout Manitoba. These strategies will help to ensure that roadside ponds are providing healthy habitat for all plants and animals, and that mass mortality of migrating animals during spring and fall is minimized.

We thank the following organizations for provided funding and support for this research: Manitoba Infrastructure, Manitoba Sustainable Development, Manitoba Graduate Scholarship, BURC, Brandon University Student Union, Canada Summer Jobs, and Lake Winnipeg Research Consortium.

About the Researchers

Pamela Rutherford

Pamela Rutherford, Ph.D.

Pamela Rutherford is an Associate Professor in the Department of Biology at Brandon University. Her research focuses on the conservation biology of amphibians and reptiles throughout Manitoba. She is particularly interested in determining the combined effects of habitat fragmentation and habitat loss on these species. Currently, she is working with two Masters of Life and Environmental Sciences (MELS) Graduate Students: Alyssa Eagle and Shawna Philpott.

Alyssa Eagle

Alyssa Eagle, Masters of Life and Environmental Sciences (MELS) Graduate Student

Ms. Eagle’s project is investigating roadside ponds in southwestern Manitoba.

Shawna Philpott

Shawna Philpott, Masters of Life and Environmental Sciences (MELS) Graduate Student

Ms. Philpott is working in the Tolstoi region of southeastern Manitoba. She is investigating wetlands that are associated with livestock and that contain the Endangered Eastern Tiger Salamander. Ms. Philpott is conducting citizen science and will be working with landowners in this area to develop strategies to mitigate any negative effects of livestock on these wetlands.


  • amphibian
  • conservation
  • reptile
  • wetlands

Publications Based on the Research

Rutherford, P. L., Eagle, A., & Philpott, S. (2017). Amphibian Protection. Technical Report provided to Manitoba Infrastructure. 36. pp.

Editor: Christiane Ramsey

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