Venomous Snake Bites in Canada: What You Need to Know & Do - First Aid Edition

Canada isn’t typically known for dangerous reptiles, but if you hike in BC, camp in Ontario, or explore the Prairies, you might just encounter one of our country’s three venomous snakes. While bites are rare, understanding how to identify venomous snakes, how to respond safely, and what first aid steps to take is essential.

At Delta Emergency Support Training, we prepare Canadians for real-life emergencies—including those that happen far from a hospital. Here’s your complete guide to snake bite prevention, identification, and treatment.

🇨🇦 Venomous Snakes in Canada

Canada is home to three native venomous snake species, all of which are rattlesnakes:

1. Eastern Massasauga Rattlesnake

• Location: Ontario (Bruce Peninsula, Georgian Bay, Muskoka)

• Canada’s only venomous snake in the East

• Generally shy and avoids humans

2. Prairie Rattlesnake

• Location: Southern Alberta and parts of Saskatchewan

• Found in dry grasslands and badlands

• More active in warmer months

3. Western Rattlesnake

• Location: Southern British Columbia, especially the Okanagan Valley

• Prefers rocky terrain and dry slopes

🐾 How to Tell if a Snake is Venomous

While identifying a snake in the wild can be difficult, here are common traits of venomous rattlesnakes in Canada:

• Triangular-shaped head

• Vertical (slit-like) pupils

• Thick body with blotchy patterns

• A rattle on the tail (but sometimes broken or not used)

• Shaking or buzzing sound when threatened

Be cautious—some non-venomous snakes mimic rattlers by vibrating their tails in leaves.

🩹 First Aid for Snake Bites

All suspected snake bites should be treated as medical emergencies, even if the snake isn’t identified.

✅ What to Do Immediately

1. Move the person to safety (away from the snake).

2. Keep them calm—movement and panic can increase venom circulation.

3. Call 911 immediately.

4. Remove tight items like rings, bracelets, or watches from the affected limb.

5. Have them lie down with the bitten limb at or slightly below heart level.

6. Apply a clean, dry dressing to the bite.

7. Mark the edge of swelling with a pen and track it over time.

❌ What NOT to Do

• Do not cut the wound or try to suck out the venom.

• Do not apply a tourniquet.

• Do not apply ice or immerse the bite in water.

• Do not give the person alcohol or caffeine.

• Do not attempt to capture or kill the snake.

🧬 What Does Snake Venom Do?

Rattlesnake venom is a hemotoxin, which means it can damage tissue, affect blood clotting, and cause intense swelling.

Symptoms may include:

• Severe pain at the bite site

• Rapid swelling or bruising

• Dizziness or nausea

• Weakness or fainting

• Difficulty breathing (rare, but serious)

In rare cases, snake bites can lead to shock or even death if untreated.

🗺️ Prevention Tips by Region

Ontario (Massasauga)

• Stay on designated trails

• Avoid tall grass and rocky ledges

• Wear boots and long pants

• Listen for rattling sounds

Alberta & Saskatchewan (Prairie Rattlesnake)

• Step carefully in dry, grassy areas

• Keep pets on a leash

• Watch where you sit or place your hands

British Columbia (Western Rattlesnake)

• Avoid rocky hillsides and dry scrub

• Don’t walk barefoot in wild areas

• Use a flashlight when hiking at night

General Prevention:

• Do not approach or handle any snake

• Keep food sealed and your campsite clean

• Hike with a buddy

• Stay alert and educate children on snake safety

🧠 Final Takeaway

Although snake bites in Canada are rare, they do happen—and when they do, quick, calm, and correct first aid can make all the difference. Our native venomous snakes are not aggressive, and most bites occur when they are accidentally stepped on or provoked.

Knowing the signs of a venomous snake, understanding how to avoid dangerous situations, and being ready to act can help keep you—and others—safe.

At Delta Emergency Support Training, we teach first aid skills that prepare you for real emergencies, whether in your home, workplace, or the backcountry. Our courses include Standard First Aid, Advanced First Aid/EMR, and Basic Life Support.

🩺 Ready to be prepared for anything? Train with us and gain the confidence to respond.

Surviving Summer: How to Respond to Insect Bites and Stings

Bites and stings are a common occurrence in Canada, especially during the summer months when we spend the most time outdoors. While most bites and stings are harmless, some can cause allergic reactions, contain venom and transmit diseases. Knowing how to properly respond to bites and stings is an important part of first aid. In addition, certain bites and stings require specific first aid measures. Here's what you need to know about first aid for wasp, brown recluse, black widow, rattlesnake bites, and tick bites:

DELTA FIRST AID TRAINEE USING FIRST AID TO TEND to HER wasp sting.

1. Wasp Stings

   Wasp stings are a common occurrence during the summer months in Canada. If you are stung by a wasp, the first thing to do is to remove the stinger if it is still present. Gently scrape the stinger out with a flat object like a credit card or fingernail. Avoid squeezing or pinching the stinger, as this can cause more venom to enter your skin. Clean the area around the sting with soap and water to reduce the risk of infection. Apply a cold compress or ice pack to the sting area to reduce pain and swelling. You can also take over-the-counter pain relievers like acetaminophen or ibuprofen to help alleviate pain.

   Watch for signs of a severe reaction, such as difficulty breathing, swelling of the face or throat, hives, or rapid heartbeat. Seek medical attention immediately if you experience any of these symptoms, as wasp stings can cause allergic reactions and anaphylaxis in some people.

   If you have a history of severe allergic reactions to wasp stings, it is recommended to carry an epinephrine auto-injector (e.g., EpiPen) with you at all times. This can help treat an allergic reaction in an emergency situation until medical attention is available.

2. Brown Recluse Spider

   Brown Recluse Spider Bites Brown recluse spiders are venomous and their bites can be dangerous, although not all bites will cause severe symptoms. If you are bitten by a brown recluse spider, clean the bite with soap and water to reduce the risk of infection. Apply a cool compress to the bite area to reduce pain and swelling. Take over-the-counter pain relievers like acetaminophen or ibuprofen to help alleviate pain.

   You may also need to elevate the affected limb to reduce swelling. Watch for signs of a severe reaction, such as fever, chills, or muscle cramps. Seek medical attention immediately if you experience any of these symptoms, as brown recluse spider bites can cause tissue damage and in rare cases, even death.

3. Black Widow Spider

   Bites Black widow spiders are another venomous species, and their bites can also be dangerous. If you are bitten by a black widow spider, clean the bite with soap and water to reduce the risk of infection. Apply a cool compress to the bite area to reduce pain and swelling. You can also take over-the-counter pain relievers to help alleviate pain.

   Watch for signs of a severe reaction, such as muscle pain, nausea, or difficulty breathing. Seek medical attention immediately if you experience any of these symptoms, as black widow spider bites can be life-threatening.

4. Rattle Snake

   If you are bitten by a rattlesnake, the first thing to do is to stay calm and still. Moving around will increase blood flow, which can spread the venom more quickly through your body. Keep the affected limb immobilized and at or below heart level to slow the spread of the venom. Remove any tight clothing or jewelry near the bite site to reduce constriction as swelling occurs. If possible, take note of the time of the bite and the location.

5. Tick:

   If you find a tick attached to your skin, the first step is to carefully remove it as soon as possible. Using tweezers, grasp the tick as close to the skin as possible and pull it out with a slow, steady motion. Do not twist or jerk the tick, as this can cause the mouthparts to break off and remain in the skin.

   After removing the tick, clean the bite area with soap and water. Apply an antiseptic to reduce the risk of infection. Keep an eye on the bite area for any signs of redness, swelling, or rash, which may indicate a tick-borne illness such as Lyme disease.

   If you develop symptoms such as fever, headache, or fatigue within a few weeks of a tick bite, seek medical attention immediately. Early treatment with antibiotics can help prevent complications from tick-borne illnesses.

Knowing how to administer first aid for bites and stings is important in preventing serious complications and ensuring a quick recovery. Remember to remain calm, identify the type of bite or sting, and take the necessary steps to alleviate the symptoms

At Delta Emergency Support Training, we understand the importance of being prepared for medical emergencies. We offer a range of training sessions to help individuals and classes develop the skills and knowledge they need to respond to emergency situations. Our courses include Standard First Aid (SFA), Advanced First Aid (AFA), and Emergency Medical Responder (EMR), and we offer in-person, hybrid, and online options to suit different needs.

If you have any questions about our training sessions or medical emergencies in general, please don't hesitate to reach out to us. You can contact us at info@deltaemergency.com and we'll be happy to assist you.