By simply hearing their parents’ song, zebra finch embryos start making last minute changes to their brains to prepare for hot weather on the other side of the eggshell.
https://www.sciencenews.org/article/songs-prep-unhatched-finches-hot-world
Adult finches make "heat calls" as the temperature rises. Exposure to the song prepares their unhatched young's brains for the heat.
