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What Are Ticks? Why These Eight-Legged Arachnids Are Not Insects

Ticks are arachnids rather than insects, and understanding their anatomy helps explain how they detect, attach to and feed on hosts.

By VuxLore
Accurate eight-legged tick on vegetation beside the title “What Are Ticks?”
Accurate eight-legged tick on vegetation beside the title “What Are Ticks?”

Ticks are small parasitic arachnids, which means they are more closely related to spiders and mites than to insects. Adult ticks and nymphs have eight legs; newly hatched larvae have six.

Why the distinction matters

Tick anatomy, life stage and species all affect how a specimen looks. Visitors trying to understand a possible tick can explore reviewed profiles in the VuxLore Tick ID Centre and use the Global Tick Hub for regional context.

Start with reliable information

The UK Health Security Agency explains that ticks are arachnids which detect potential hosts from vegetation. Read the UKHSA tick-awareness guidance.