What Attracts Lone Star Ticks to Your House?

The lone star tick is often called an aggressive hunter because, unlike ambush species that simply wait on a leaf, it will actively move toward a host it detects nearby. That's a real behavioral difference from ticks like the deer tick — but it's still host-directed behavior, not house-directed behavior. Nothing in the biology of this species has it moving toward a building; it moves toward the cues a live host gives off, and once it attaches, wherever that host goes is where the tick goes, including through a front door.

Our old page's language — "suitable environments and certain conditions that make it easy for them to survive" — describes yard and habitat conditions, then implies the house benefits from them. It's the opposite: the tick was never oriented toward the house at all.

UNH Cooperative Extension is direct that the lone star tick "rarely turns up in New Hampshire," and it's not settled whether the specimens found here overwintered locally or hitchhiked up from further south. Separately, the CDC confirmed its presence in the state as of 2020, and it's described as moving north and westward over time. Practically, that means this is currently the least likely tick on this hub to be the one you're dealing with in New Hampshire — but if it does turn up, the same principle applies as with every other tick here: a host carried it, the house didn't attract it.