American toad

American toad James Paterson

Backyard Frog Survey

Anyone can participate in Ontario Nature’s Backyard Frog Survey, a program that tracks the location of frogs and toads through voluntary submissions we receive from citizen scientists.

Since Environment Canada started the Backyard Frog Survey in 1992, volunteers have submitted more than 100,000 entries from some 200 sites.

Biologists use the survey data to detect changes in population numbers, distribution and calling dates. The data also helps us develop range maps for the Ontario Reptile and Amphibian Atlas and to estimate the total population of a species across the province.

Do your own backyard survey

  1. Pick a survey location near your home where frogs live, such as a pond or another wetland.
  2. Email us at to receive reporting cards and resources to help you identify frogs and toads by sound. You can also download the excel reporting spreadsheet for the Backyard Frog Survey.
  3. Go to your survey location on spring evenings and listen for frogs for three minutes. Do this as often as possible. (Observations made at other times of the year are also valuable.)
  4. Write down what you heard on the reporting cards and mail them to us at:

Backyard Frog Survey
Ontario Nature
214 King Street West, Suite 612
Toronto ON M5H 3S6

Please join us in the Ontario Reptile and Amphibian Atlas Facebook group to talk about these amazing animals, exchange photos and find out the latest news.

For more information about or to join the survey, please email or call 1-800-440-2366 ext. 243.

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