We expect bird species to be more diverse in the tropics, which are known as biodiversity 'hot spots.'
But the study reveals new suboscine bird species actually emerge more quickly from so-called 'cold spots.'
Hot spots like the Amazon rainforest are "places where lots of species live currently," but not "exactly engines of new species formation" according to Michael G. Harvey, lead author on the study.
The study gives a reason for scientists to consider conservation efforts in not just the tropics, but in these 'cold spots' too.
The study was also critical for its diversity behind the scenes, featuring key contributions from women and Latinx ornithologists around the world.