A first look at geographic variation in Gentoo penguin calls

Vocal communication is central to the lives of many birds, which use sound to attract mates and defend territories. Penguins are no exception, but we know little about how or why penguin vocalizations vary between isolated populations. A new study takes a broad look at vocalizations across the range of Gentoo penguins and concludes that while their calls do vary from place to place, we still have lots to learn about the processes at work.