Supplementary material 1: Typical red lark (Calendulauda burra) habitat at our study site at Black Mountain Conservation Area, Aggeneys, South Africa.
Supplementary material 2: Red lark (Calendulauda burra) resting in a shaded microsite on a very hot day at Black Mountain Conservation Area, Aggeneys, South Africa. The air temperature at the time the video was recorded was 39 °C. (MP4 31812 KB) (https://link.springer.com/article/10.1007/s00360-018-1190-1#Sec18)