Prevention (biological): guinea fowl and chickens (limited evidence)
Guinea fowl and free-range chickens eat the occasional adult tick they encounter, but field studies show no measurable reduction in tick populations.
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Guinea fowl and free-range chickens are popular folk remedies for tick control on rural property. The evidence is thin and mixed.
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Guinea fowl will eat adult ticks they encounter while foraging. A 2024 Journal of Medical Entomology study ("Release the hens") found no measurable reduction in lone star tick populations or pathogen prevalence from guinea fowl.
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Earlier work suggested some effect on adult blacklegged ticks, but not enough to drive down population.
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Guinea fowl can themselves host immature lone star ticks, which complicates the picture.
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Birds will not seek out questing nymphs in leaf litter, where most human exposure happens.
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If you keep guinea fowl or chickens for other reasons, count any tick removal as a small bonus. Do not buy birds expecting them to fix a tick problem.