Outdoor Wildlife Safety: Bears, Bites, Stings, Spiders & Snakes

Keep the advice local

The animals that matter change with location, season, habitat, and activity. Before a trip, check current provincial, state or territorial health alerts and local land-manager information. Learn which bites or stings are a concern where you are going, when they are active, and where to get medical help. Insect-borne disease risks vary by place and can change over time.

Tick identification, tick-borne disease context, removal and follow-up live in the separate Tick Awareness and Tick Removal guides. The ethics of bear and predator hunting are a separate subject in Bears, Predators & Ethical Context.

Bear manners and encounter safety

Treat a bear as a wild animal that needs space, an unobstructed route away, and access to natural food. Never approach, follow, surround, feed, or try to photograph it at close range. Keep dogs leashed and under control; do not let children wander. Travel alertly, make ordinary human noise where visibility is limited, and leave the area if you find a carcass or fresh bear sign. At camp, store food, garbage, toiletries, and other attractants exactly as the land manager directs. Respect closures and posted viewing distances.

If you see a bear, stop and assess. If it has not noticed you, quietly move away without drawing its attention. If it has noticed you, stay calm, speak in a steady voice, keep your group together, do not run, and slowly back away or make a wide detour. Do not block its route. If it approaches, have bear spray ready and follow the local land manager’s advice for the species and behaviour.

Attack response is not one-size-fits-all. Defensive encounters and predatory behaviour call for different actions, and official advice differs by region and bear species. Do not turn “play dead” or “fight back” into a universal rule. Regional field guidance or hands-on instruction should teach how to recognize defensive versus non-defensive behaviour and what to do if contact occurs.

Bear spray: what it does and how to carry it

Bear spray is a close-range, last-resort deterrent, not a repellent or a guarantee. Its capsaicin cloud irritates a bear’s eyes and respiratory system and can interrupt an aggressive approach, giving a person a chance to get away. Wind, rain, cold, distance, product condition, and user exposure can affect the result. It can also seriously irritate a person who is exposed.

• Choose a product specifically labelled for bears and legal where you will travel. Read its label and check its stated range, instructions, and expiration date.
• Carry it secured in a holster where you can reach it immediately; do not bury it in a pack. Keep the safety device in place until needed, and learn how it releases before entering bear country. An inert training canister can help you practise safely.
• If a bear approaches in a threatening way, remove the safety and use it only at the distance and in the manner stated on that canister. Aim to create a barrier between you and the bear; wind can blow spray back toward you. Leave the area once the bear retreats.
• Check the expiry date before each trip and replace an expired or partly used canister. Follow local rules for disposal and transport; bear spray is generally prohibited on commercial aircraft.
• Never spray it on skin, clothing, tents, or equipment. It is not a preventative coating. Follow label directions if accidental exposure occurs.

Plan communications before leaving coverage

Before entering an area without cell service, carry an appropriate emergency communication device, such as a satellite messenger or registered personal locator beacon. Learn how to use it and leave a trip plan and overdue time with a trusted contact. Technology can fail, so also learn local emergency procedures and carry basic navigation and signalling equipment. See Backcountry & Partner Safety.

Mosquitoes, biting flies and repellent

Mosquitoes, blackflies, and other biting flies can make a trip miserable. Mosquitoes can spread disease in some places, so check local public-health updates. Use a locally approved repellent according to its label, cover exposed skin with suitable clothing, and use intact netting where needed. Not every bite carries disease, and no single disease risk applies across North America.

Bees, wasps, hornets and other stinging insects

Keep food and waste managed, avoid disturbing nests, and move away calmly from a single insect. If someone has a known serious sting allergy, they should follow their clinician-provided action plan and carry their prescribed emergency medicine as directed.

A severe allergic reaction is an emergency, even without a previously diagnosed allergy. Trouble breathing, throat or tongue swelling, or collapse after a sting requires immediate emergency help. Call 911 or use the available emergency communicator; if the person has a prescribed epinephrine auto-injector, use it promptly as directed by their action plan and device instructions. Seek emergency care even if they improve.

Fire ants and scorpions are location-specific U.S. hazards; check local public-health or land-management sources rather than assuming they occur everywhere or in Canada.

Spiders

Most spiders avoid people, and species that merit special awareness vary by region. In Canada, Health Canada describes black widow spiders as rare and found mainly in southern regions along the U.S. border. CDC/NIOSH describes black widows as occurring throughout North America but most common in the southern and western United States, and brown recluse spiders in the Midwestern and southern United States. HealthLink BC says brown recluse spiders are not usually found in Canada. These broad notes do not confirm that a species is present at a particular campsite.

A skin lesion does not prove a spider bite. Avoid handling spiders, nests, or egg sacs, and check shoes, gloves, clothing, and stored gear before use in places where spiders may shelter.

Snakes

Venomous snakes native to the destination matter, with rattlesnakes an important example in parts of Canada and many regions of the United States. Copperheads, cottonmouths, and coral snakes are additional U.S. regional examples; they are not present everywhere. Local authorities should confirm which snakes occur at the destination.

Stay on clear routes where practical, look before stepping or reaching around rocks, logs, brush, and woodpiles, wear sturdy footwear and long pants where appropriate, and give every snake room to leave. Never handle, corner, kill, or try to capture a snake. Do not use a drawing or a quick field test to decide that an unknown snake is harmless.

If someone is bitten or stung

• A suspected venomous snakebite, including an unknown snakebite where venomous species may occur, needs emergency assessment even if the person initially feels well. Call 911 where available. Trigger a satellite communicator’s SOS or a registered PLB if one is available, and give the dispatcher the best location, bite time, symptoms, and safe access route.
• If no device can send an alert, organize the safest prompt evacuation to definitive medical care; do not wait in place indefinitely for a cell signal or for symptoms to appear. If there is a group, one person can seek a way to summon help while another stays with the patient if safe and practical. Remote extraction may require organized ground or helicopter rescue. The best action depends on injury, terrain, weather, distance, and available help; there is no universal “walk out” or “stay put” rule.
• Keep the patient as calm and still as practical, remove constricting items near the bite before swelling, and note the bite time and symptoms. Do not drive yourself. For U.S./Canadian pit-viper bites, the 2026 Wilderness Medical Society guidance recommends loose limb immobilization at heart level and no pressure-immobilization bandage. That guidance does not cover coral snakes or snakes outside the United States and Canada; for an unknown snake or a suspected coral-snake bite, obtain immediate emergency or poison-service instructions.
• Do not wait for symptoms, approach or capture the snake, cut the wound, suck out venom, use ice, or apply a tourniquet. A photo from a safe distance may help responders, but no one should get closer to take one.
• For a possible serious allergic reaction after a bite or sting, call 911 or activate the available emergency communicator immediately; use prescribed epinephrine as directed. Do not let a field guide delay urgent care.
• For a concerning spider bite, scorpion sting, or unexplained skin lesion, contact a qualified health professional or poison service promptly. Severe symptoms, especially breathing difficulty or collapse, require emergency services.
• In every case, use current local medical guidance. This page is not a first-aid course or a substitute for emergency services.