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February 23, 2026Behavioral EcologyOpen Access

Impact of increased nest temperature on incubation behaviour and female health in Eurasian Blue Tit

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Experimental temperature increase altered incubation period and health in Blue Tits, suggesting climate change impacts reproductive costs.

To assess the impact of increased nest temperature on incubation behaviour and female health in Blue Tits.
Experimentally increased nest temperature by an average of 3.29°C in Blue Tit nests.
Monitored time spent incubating and parasite infections in females from heated vs control nests.
Compared offspring fitness-related traits between both groups.
Females in heated nests had shorter incubation periods with more frequent sessions.
Fewer infected females in heated nests showed lower parasite intensity.
Control females showed similar reproductive success despite higher incubation effort.

Río et al. (2026) studied this question.

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Experimental temperature increase altered incubation period and health in Blue Tits, suggesting climate change impacts reproductive costs.