https://www.discoverwildlife.com/animal-facts/amphibians/star-trek-frogs-discovered-madagascar

Strange ‘Star Trek’ sounds are echoing through Madagascar’s remote rainforests. Scientists just found what’s causing them
The otherworldly sounds are being made by an orchestra of little animals – all of which are new to science.

Seven brand-new species of tree frogs have been discovered in the rainforests of Madagascar; and their high-pitched, whistle-like calls sound like something straight out of Star Trek.

Cute frogs but I would have said they sound like some kind of bird call