Definition
A tick is not an insect.
Ticks are arachnids, so they are more closely related to spiders and mites. More than 40 tick species are found in Canada, although only some are known to spread pathogens to people.
A small, blood-feeding arachnid that attaches to a person or animal for a meal, then drops off after feeding.
They crawl
Ticks do not fly or jump. They can wait on grass, leaves or low vegetation and attach when a host brushes by.
They attach
A tick anchors its mouthparts in the skin and may remain attached while taking a blood meal.
They can be tiny
Nymphs are small and an attached tick can be mistaken for a freckle, scab or speck of dirt.
The Public Health Agency of Canada describes ticks as small arachnids, notes that more than 40 types are found in Canada and explains that bites are often painless. Read the federal tick overview ↗
Lifecycle
Four stages. Several opportunities to feed.
A tick needs a blood meal at different points in its lifecycle. The full cycle can take years, depending on the tick species and environmental conditions.
- EggLaid by an adult female. Eggs do not feed.
- LarvaSix-legged and very small; seeks an early blood meal.
- NymphEight-legged and easy to miss; feeds before becoming an adult.
- AdultEight-legged; adults feed and reproduce.
Ticks do not hatch already carrying every pathogen of concern. A tick may become infected when it feeds on an infected host. It may later pass that pathogen to another host during a subsequent blood meal.
Mechanism
How can a tick-borne infection happen?
The pathway involves a suitable tick species, a pathogen and an exposure. Finding a tick does not automatically mean an infection occurred.
An animal host carries a pathogen.
A feeding tick may acquire that pathogen.
The tick develops and later seeks another host.
While attached and feeding, an infected tick may transmit it.
Species, geographic area, attachment and feeding details, symptoms and personal medical factors can all change the clinical picture. A photo and a timeline are useful inputs for an Ontario tick-bite assessment.
Habitat and activity
Where—and when—you might meet a tick.
Ticks are often associated with wooded and brushy areas, tall grass, leaf litter and places where animal hosts travel. They can also be carried into maintained spaces by people, pets and wildlife.
Edges matter
Trail edges, brush, tall grass and leaf litter can create contact points between ticks and passing hosts.
Above freezing
Ticks can be active whenever temperatures are above freezing and the ground is not covered in snow—not only in summer.
Blacklegged ticks
Established populations are found in parts of western, southern and southeastern Ontario, and risk areas continue to change.
Staying on cleared paths can reduce contact, but it does not make exposure impossible. A simple post-outing check is useful after time in any potential tick habitat.
That does not automatically rule out Lyme disease: ticks can be tiny, bites are usually painless and some people do not develop a rash. See what a missing bite memory does—and does not—mean →
High-intent next step
Found an attached tick? Start with removal and a record.
Remove an attached tick as soon as possible. Then preserve the details a clinician may need instead of trying to judge risk from appearance alone.
- Use clean fine-tipped tweezers to grasp the tick as close to the skin as possible.
- Pull upward slowly and steadily. Avoid twisting, crushing or squeezing the tick.
- Wash the bite area and your hands with soap and water or an alcohol-based sanitizer.
- Take clear photos and record the date, likely exposure location, removal time and any symptoms.
- Seek medical advice when appropriate; do not wait on an online pathway if symptoms are severe or rapidly worsening.
ONOntario clinician pathway
Turn the details into a care plan.
AfterTick’s private intake helps eligible Ontario residents organize bite timing, location, symptoms and photos for licensed clinician review.
AfterTick is not an emergency service. Trouble breathing, facial swelling, fainting, severe symptoms or rapidly worsening symptoms require emergency care.
Common questions
Tick basics, answered.
Are ticks insects?
No. Ticks are arachnids, related to spiders and mites. Adult ticks have eight legs; larval ticks have six.
Do ticks jump or fly?
No. Ticks do not jump or fly. They wait on vegetation or move across surfaces and attach when a person or animal brushes past.
Can every tick transmit Lyme disease?
No. Not every tick species can carry the bacteria that cause Lyme disease, and not every blacklegged tick is infected. Other tick species may be associated with other pathogens.
Why can a tick bite be hard to notice?
Tick bites are often painless, and immature nymphs can be very small. A full-body check after possible exposure helps find attached ticks.
What should I do after finding an attached tick?
Remove it as soon as possible using clean fine-tipped tweezers, grasping close to the skin and pulling upward slowly and steadily. Clean the bite area, record relevant details and seek medical advice when appropriate.
Primary references
Sources and editorial notes.
- Public Health Agency of Canada: Ticks ↗
Biology, lifecycle, Canadian activity and geographic context. - Public Health Agency of Canada: Prevent tick bites ↗
Removal, checks and bite-prevention guidance. - Government of Ontario: Tick-borne diseases ↗
Ontario-specific exposure, removal and symptom information.