The extremely rare breed of New Guinea’s “singing” dogs was found again in the wild after 50 years until 2016, when an expedition found 15 of them. One more expedition was carried on in 2018 by a group of scientists that collected samples to determine if the wild dogs are the ancestors of the singing dog breed. There are around 200 singing dogs in captivity and not one singing dog was seen in the highlands for 5 decades.

This rare breed is famous for their howls that are similar to the sounds of humpback whales. According to San Diego Zoo, their howls sound like a yodel with the tones going up and down. If they are in packs, one dog starts singing and others join in at different pitches, each with its own unique voice. Scientists are looking forward that more singing dogs could breed in their natural environment.