7 Animals that Can Be Heard for Long Distances



If you happen to hear the call of a "laughing" or spotted hyena, we recommend you leave the building. Hyenas make the staccato, high-pitched series of hee-hee-hee sounds (called "giggles" by zoologists) when they're being threatened, chased, or attacked. This disturbing "laugh" can be heard up to eight miles away.