Proceedings of the Royal Society B: Biological Sciences (2026). DOI: 10.1098/rspb.2026.0153"> Scotinomys teguina song and potential sound production mechanisms. Credit: Proceedings of the Royal Society B: Biological Sciences (2026). DOI: 10.1098/rspb.2026.0153 Mice do more than just squeak when they want to make a noise. They can also sing. And the way they do it is different from most mammals that produce sounds by vibrating their vocal cords. When Alston's singing mouse (Scotinomys teguina) makes its music, it does so by puffing up an air sac in its throat. The mouse that whistles Alston's singing mice are small rodents native to the cloud forests of Mexico and Central America. They communicate using high-pitched notes in long, melodic strings that are much more complex than the simple squeaks of many other rodents. Samantha Smith, an integrative biologist at the University of Lausanne in Switzerland, and her colleagues wanted to know how these mice evolved to produce such distinctive sounds.…