TARRANT COUNTY (CBS 11 NEWS) – They are tiny black insects and they have taken over parts of Tarrant County.

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“I’ve been here 15 years and haven’t seen anything like this,” Watauga resident Glenn Knight explained. “I don’t know what this is.”

Knight says when he walks outside, he is immediately attacked.

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The swarm of insects cover his windows, cars and have even made their way inside his home. “They jump on you. They get down in your clothes,” he said. “They crawl down in your shirt.”

The tiny bugs are called Hackberry Nipple Gall Maker insects.

According to experts, they are homeless bugs in a sense and when it gets cold, they too want to be inside someplace warm.

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“They are really just a nuisance. They’ve come out over winter. Once the leaves start falling it stirs them up,” explained Johnny Gibson, with Savior Termite & Pest Control. “They don’t bite. They don’t sting. They are just annoying.”

Experts say they’ve been getting a lot of calls in the last few days. Their advice — make sure all your windows are sealed and if you find them inside your home, vacuum them up. The bugs don’t live very long and will eventually die.

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