From singing whales and squeaking bats to thumping spiders and clicking dolphins, the world is filled with the exotic sounds of our fellow creatures. What are they saying? Can we decode their communications? NOVA Wonders follows researchers around the globe who are deciphering an amazing array of clues that reveal how animals share information critical to their survival.

Originally released by PBS, 2018. Streaming video file encoded with permission for digital streaming by Infobase on August 29, 2019.

Decoding Animals (2:47); --Canine Communicators (2:21); -- Chatty Primates (5:01); -- Cracking the Chimp Code (7:31); -- Spider Love Language (6:59); -- Vocal Learning (5:51); -- Translating Animals (7:23); -- Dolphin Speak (4:40); -- Where Does Language Come From? (9:22); -- Credits: What Are Animals Saying? (1:08); .