Researchers Identified Nocturnal Feeding in Sheep Ticks
A 2022 field study revealed that European sheep ticks exhibit peak host-seeking behavior during dark hours.
Updated on Sept. 21, 2026 in Environmental
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Researchers investigating tick activity patterns at Lyme Park, England, identified that European sheep ticks predominantly engage in questing behavior at night. This observational study, conducted throughout 2022, highlights a behavioral shift that likely correlates with the activity cycles of host mammals.
Why it matters
Understanding the nocturnal activity of the primary disease vector for Borrelia burgdorferi provides critical context for human exposure risk. This finding suggests that traditional daytime risk models for tick encounters may be incomplete as climate patterns change.
Researchers used fabric blankets dragged across the ground every four hours to quantify density, discovering that sheep ticks frequently climb vegetation during the night to seek hosts. The study identified that ticks retreat into the soil during dry nights, likely due to limited water-conservation mechanisms.
The players
European sheep tick
A parasitic arachnid that serves as a primary vector for Borrelia burgdorferi and various pathogens across European landscapes.
The details
The researchers employed a manual dragging technique, pulling large fabric blankets across vegetation every four hours to capture ticks throughout the diurnal cycle. By correlating tick density with environmental sensors, the team determined that host-seeking behavior is strongly associated with nighttime temperatures, whereas hot, dry daytime conditions suppress activity. Ticks lack the physiological adaptations necessary to maintain water balance during arid periods, forcing them to remain in the soil rather than questing on vegetation.
Timeline
January 2022 to December 2022: Researchers conducted intensive tick sampling in Lyme Park.
May: Fewer ticks were caught during midday in the UK.
The Tech Race
This study updates the assumptions underlying Lyme disease vector surveillance protocols by documenting nocturnal behavior that is not typically tracked by standard daytime sampling. These findings indicate that current public health models must adapt to account for shifts in vector activity that do not align with human daylight hours.
Residents in endemic areas should note that tick exposure risk is not confined to daylight hours, potentially changing the timing for protective measures. These findings suggest that current tick-avoidance workflows, which emphasize mid-day awareness, may need to incorporate nighttime precautions.
The takeaway
This discovery highlights the importance of re-evaluating vector monitoring to include nocturnal activity as a critical data point. Future research will focus on how regional climate shifts in temperature and humidity further alter these patterns of activity.
Further reading
For more on the changing behavior of disease vectors in varying climates, visit Environmental.
Source note: This article includes information reported by The Independent.
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