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How do ticks find a host?

Ticks use specialised senses to detect cues such as carbon dioxide, body heat, movement and odours, then crawl towards or grasp a suitable passing host.

Reviewed by VuxLore® Knowledge Team For Everyone

Short answer

Ticks use specialised senses to detect cues such as carbon dioxide, body heat, movement and odours, then crawl towards or grasp a suitable passing host.

At a glance

Host-seeking behaviour differs among species and life stages. Many hard ticks quest on vegetation, while some ticks remain close to nests, burrows or animal resting places.

Key takeaways

• Ticks sense several host-related cues.

• Questing ticks wait with their front legs ready to grasp a host.

• Behaviour varies by species, life stage and environment.

Sensing the opportunity

Ticks do not need eyesight like a person to locate a host. Sensory structures, including organs on the front legs, help them respond to environmental and host cues.

Questing is not chasing

A questing tick typically climbs a suitable surface and waits. When a person or animal brushes past, it can grip and begin crawling. This helps explain why staying clear of dense vegetation where practical can reduce contact.