The Indian giant squirrel makes a series of high-pitched and staccato chirrups, which carry over long distances in the forest. Rajamani, whose lab is studying their acoustics, likens them to the sound of toy machine guns. “It sounds extra loud, given the size of the animal. There is no other sound in the forest quite like it,” she says.  “We have recorded around six to seven different types of calls made by Indian giant squirrels,” she adds.  Photo: Surya Ramachandran
