Watersheds Canada – Work, Live & Play in Healthy Lakes and Rivers

Watershes CA Logo
Partners Login Sign Up
  • Programs
  • About Us
  • What’s New
  • Conference
  • Ways to Help
  • Blog
  • Contact
  • Donate
  • Programs
  • About Us
  • What’s New
  • Conference
  • Ways to Help
  • Blog
  • Contact
  • Donate

Blog

Sleeping Through the School Year – A Turtle’s Strategy for Survival in Canada

September 5, 2019 By Monica Seidel 5 Comments

by Monica Seidel, Digital Communications and Marketing Intern

Growing up, many of us would have welcomed the idea of sleeping in and missing school. Perhaps there was an early morning class or teacher you were not fond of, or you had to trek through the cold to get to school. If someone had offered you the option to simply sleep through half of the year, bypassing the cold and school year, would you have done it? How would you have been able to survive sleeping that long?

While they are not worried about skipping school, Canada’s turtle species have to resort to extreme measures to survive our cold, cold winters. Turtles are cold-blooded animals which means they need an external source of heat to control their body temperature. Many turtle species sit out in the sun on a log or rock to warm up, called basking. When they are cold, they become slow and sluggish, making them more susceptible to predation, being hurt on roadsides, and slower in finding a hibernation site, nesting area, or mate.

To survive Canada’s cold, long, and dark winters, turtles use a technique called hibernation. In late fall, turtles will dig down to the bottom of certain water bodies and enter an induced sleep underneath the soil until springtime. To survive the winter, turtles must have enough food stored up to survive all those months, but also have enough energy to emerge in spring and find themselves some food. Cold temperatures at the bottom of water bodies mean turtles will slowly use up their food supplies.

Turtle species may hatch from their egg in the fall, meaning they have to find a suitable hibernation site quickly. If these “fall hatching” eggs do not hatch before winter, there is a very low chance of survival as the eggs will freeze. Some species, however, have adapted to hatching the following spring. These species, like the midland painted turtle (Chrysemys picta marginata; pictured below), can survive the winter because of a large yolk sac. Species that stay in the egg through the winter may have additional benefits, such as avoiding predation in the fall, avoiding the risk of an early winter or early freeze, and emerging from their egg in the spring when there is ideal weather conditions and plenty of food available.

Turtles are amazing creatures who have adapted to a country known for its extreme weather. They are so smart that they have figured out how to live through tough Canadian winters without having to directly deal with the ice, snow, short hours of sunlight, and cold temperatures – perhaps they do not need school after all!

You can support Canada’s turtles by symbolically adopting a painted turtle or a Blanding’s turtle! Each symbolic adoption is eligible for a Canadian tax receipt, and comes with a 5″x7″ postcard featuring artwork by a Canadian artist.

___

Turtles are beginning to find hibernation sites this time of year, so it is important to know how you can help turtles have the best chance at survival. If you see a turtle crossing the road, you can help it in the way it is walking if it is safe for you to do so. This is a great video showing how to help a snapping turtle (Chelydra serpentine) cross the road, as special consideration must be made for their large size and risk of snapping. For all other turtle species, you can safely handle them by firmly grabbing them with both hands in the middle of their shell like a sandwich. Make sure to wash your hands after handling a turtle, as all species in Ontario naturally carry salmonella, which can be passed to humans. If you notice an injured turtle, contact the Ontario Turtle Conservation Centre (705-741-5000) or a local wildlife rehabilitation centre for instructions to help and transport the turtle.

Filed Under: Blog

  • James Kirk | April 19, 2023 9:43 am

    At what external temperature do snapping turtles stop hibernating and ‘wake up’?

    Reply
    • Monica Seidel | April 28, 2023 10:49 am

      Hi James, thank you for reaching out! We spoke with a colleague at the Canadian Wildlife Federation who works with freshwater turtles to get an answer to your question. They said they have seen snapping turtles come up for air when only a tiny corner of a pond was ice-free so they think the triggers might be more related to changing light levels as the ice opens up, or changing oxygen levels in the water. In fact, turtles are not completely immobile all winter! In the springtime, they likely go from a state of being extremely lethargic to being wide awake over several days.

      Reply
  • Benjamin MacNeill | January 15, 2022 12:29 pm

    I have a question how many heart valves do the common snapping turtle have and what are the ways that they can breathe?

    Reply
  • Martin Schneider | September 23, 2021 10:54 pm

    How do they live in hibernation without oxygen (anaerobic)?

    Reply
    • Monica Seidel | September 27, 2021 9:55 am

      Great question, Martin! For turtles hibernating in water bodies with oxygen, hibernating on the bottom means they have access to more oxygen and warmer temperatures than would be found closer to the surface. Secondly, turtles have specific tissue in their tails which allows them to take in oxygen during hibernation (cloacal respiration). In areas with no oxygen, turtles have even more adaptations! I encourage you to learn more about this process in the case of painted turtles in this open access scientific article: https://physoc.onlinelibrary.wiley.com/doi/pdf/10.1113/jphysiol.2002.024729

      Best,
      Monica

      Reply
  • Submit a Comment Cancel reply

    Get Involved!

    Explore volunteer, internship and co-op opportunities.

    Contact Us

    Sign up for our Newsletter!

    Sign up for our FREE newsletter to receive the latest news from Watersheds Canada:

    • Home
    • Our Programs
    • About Us
    • What’s New
    • Blog
    • Ways to Help
    • Contact
    • Donate
    footer-logo
    Phone: 613-264-1244Office: 115-40 Sunset Boulevard, Perth, Ontario K7H 2Y4
    © Copyright Watersheds Canada. All rights reserved.
    Privacy Policy | Web design/development by 1dea Design + Media Inc.
    • Work, Live, Play in Canada’s Lakes & Rivers
    • Staff & Board Members
    • Annual Reports
    • Employment
    • Partners & Supporters
    • Our Impact
    Sign-up for our monthly newsletter!

    You will sign-up for our monthly newsletter which gives you free tools and information to protect your freshwater.

    Name
    Address
    This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.