Spatial variation in avian phenological response to climate change linked to tree health

Nature Climate Change, Published online: 27 September 2021; doi:10.1038/s41558-021-01140-4

Climate change–induced shifts in seasonal events are often studied at population levels, which can neglect the scale at which selection operates. Here, the authors show marked small-scale spatial variation for egg-laying timing of great tits and further link these changes to the health of nearby oaks.