Hikers in Papua New Guinea heard the “harsh” sound coming from the treetops and followed it. Take a look at what they discovered.

Hiking through the dense rainforest of Madagascar, scientists heard a series of “otherworldly” sounds. The “somewhat bizarre” calls came from several “cute” creatures living near streams.

Hikers in Papua New Guinea heard an “eep-eep-eep” sound and followed it to a yellow-spotted animal. Take a look.

Listen to CBeebies Radio on BBC Sounds every day from 7pm for more sleepy sounds and stories for bedtime.