What makes mountain birds sing at dawn—and why are they sometimes quiet? Ecologists explain

Three species of melodic African warblers refuse to rise early and sing their usual dawn songs when the weather is cold. This new discovery was made recently by a team of soundscape ecologists in South Africa’s mountainous Golden Gate Highlands National Park. The team’s co-research leader, Mosikidi Toka, studies how animals and the environment produce and use sounds, particularly in mountains, and is currently completing a doctorate on this issue. on the sounds of natural habitats. He deployed automated audio recorders to record bird song and learn how birds were affected by freezing temperatures.