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A warmer nestbox

Seasonal organisms use temperature as a cue in reproductive decisions, but the role of climate change is not yet clear. Here, a group of researchers used next-boxes located in woodlands from CEREEP to impose an experimental increase in temperature during laying in a small passerine bird, the great tit. This study reveals that heated females adjusted their incubation behavior and the number of eggs laid, and produced nestlings of equal condition over the season, unlike control females. A small temperature increase may therefore influence breeding strategy and offspring phenotype.