Even though a tick is not an insect, to us it’s still a bug…

While insects primarily smell with their antennae, ticks are not insects; rather, they’re arachnids, and they don’t have antennae. Instead, a tick smells using a structure on its forelegs called the Haller’s organ. The Haller’s organ is described as a tiny “sensory pit” that can detect chemicals like carbon dioxide, ammonia, or pheromones. It can even sense humidity and infrared light, which includes body heat emitted by the warm, blood-filled creatures that the tick wants to find.

Read the full article “An Up-Close Look at the Tiny Sensory Pits That Ticks Use to Smell” by Meredith Swett Walker for Entomology Today.

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