Massasauga Rattler

The massasauga rattler is a species of rattlesnake that inhabits parts of the United States and southern Ontario in the middle of North America. It is a pit viper, and pit vipers are all poisonous snakes, just like rattlesnakes.


The only poisonous snake in Canada is the Massasauga Rattler. They are present in several areas of the United States and Ontario. Large black or brown patches on a tan or grey body help identify them. Of course, they also have a characteristic rattling. Despite being a very peaceful snake, it will bite if threatened.


Their heat-sensitive pits, which are located between their nostrils and eyes, allow them to detect their prey. The Massasauga Rattler often feeds on small mammals and injects its victim with venom to make it easier to consume. However, if the snake is startled or feels threatened, it may potentially attack people.


They have a grey or tan background hue with three smaller rows of alternating spots down each side and a row of huge, circular, brown/black blotches or spots down the middle of the back. There are also reported incidences of solid black melanistic blotches and fusions of the side and rear blotches. Young massasaugas have distinct patterns, however they are paler than adults. They feature solitary anal scales, keeled scales, and heat-sensing pits on either side of their little heads.

Photo: wildlifepreservation.ca
Photo: wildlifepreservation.ca
Photo: torontozoo.com
Photo: torontozoo.com

Top 10 Most Dangerous Animals in Canada

  1. top 1 Wolverines
  2. top 2 Massasauga Rattler
  3. top 3 Black bears
  4. top 4 Killer whales
  5. top 5 Black widow spider
  6. top 6 Elks
  7. top 7 Moose
  8. top 8 Polar bears
  9. top 9 Cougars
  10. top 10 Canadian brown bear

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