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the claim
Ticks detect hosts by carbon dioxide.
the verdict
INSUFFICIENT LEANING
Recorded sources
4 sources for · 0 against
Is it true that ticks detect hosts by carbon dioxide?
Unclear. Several sources state that ticks sense carbon dioxide through sensilla of Haller's organ as one of the host-derived cues used in host-seeking, though the detailed studies focus on radiant heat rather than CO2 itself. No source disputes that ticks detect CO2.
Verdict: PARTIAL LEAN · 4 sources for, 0 against · Last checked
Evidence for · 4
Get citation
Ticks Home in on Body Heat: A New Understanding of Ectoparasite Host-Seeking and Repellent Action. (2019). doi.org. https://doi.org/10.1101/564179
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More for · 3
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Ticks home in on body heat: A new understanding of Haller’s organ and repellent action. (2019). doi.org. https://doi.org/10.1371/journal.pone.0221659
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Chemically mediated behavior in Acari: Adapations for finding hosts and mates. (1986). doi.org. https://doi.org/10.1007/bf01638998
Get citation
Johnson, N. (2023). Ticks. play.google.com. https://play.google.com/store/books/details?id=02CZEAAAQBAJ&source=gbs_api
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held for human review18 Oct 2026
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