How incubation temperature affects sexual signals, such as birdsong structure and singing behaviour, has rarely been explored, especially in wild free-living animals. To address this knowledge gap, we
How incubation temperature affects sexual signals, such as birdsong structure and singing behaviour, has rarely been explored, especially in wild free-living animals. To address this knowledge gap, we
Because the maintenance of proper developmental temperatures during avian incubation is costly to parents, embryos of many species experience pronounced variation in incubation temperature. However, t