They use them to hear things, and in so doing, to gain information of their environment,
in order to enhance their safety and security as they make their way through their world.
In that regard, they strongly resemble many other members of the animal kingdom.
There are a lot more animals than just 2 that make unusual or loud sounds.
All animals have different sensitivities of hearing. Different animals hear different sounds. Like a dog. A dog has one of the most sensitive hearing levels. That's what dog whistles were meant to do. They were supposed to make it so humans can't hear it but dogs can.
Any sounds animals make.
Tortoises are generally silent animals and do not typically make vocal sounds. In some cases, they may produce hissing sounds when feeling threatened or scared.
Sloths are generally quiet animals and they make very soft vocalizations such as hisses, squeaks, and grunts. The sounds they make are usually used for communication between mothers and offspring or during mating.
Animals do make sounds but it's not all of the animals that make sounds.
Thats like saying how do we humans make diffrent sounds if you think about it how do you make diffrent sounds? and thats your answer!
Because different animals, birds and other creature live there.These are the sounds of different animals
Most animals have vocal cords more or less complex than ours, therefore they can make different noises. Ours are advanced enough to make sounds LIKE them but not exactly.
Listen to some animals! See what sounds you like - growls, howls, grunts, whatever. It's your language. Make whatever sounds good to you. Animals make an awful lot of different sounds.
There have been some scientific articles written that say that animals have something similar to "accents", that in different areas, their sounds are somewhat different, and all of the animals in a specific area that are the same breed, make that same local sound or sounds.
These animals make many different sounds. They grunt and chirp. They even purr with a growl like sound. They are loud and vocal. They squeal a lot.
animals make the sounds they do is just like human languages.... for example a whistle may mean they are calling for their family. The animals make the sounds they do because they all need to communicate with each other.
they listen
Depends on the animal. Some can fly, bark(or make different noises from us,) Robin Williams probably can imitate certain animals sounds.
Animals make different sounds when they are in pain. For example, a horse would neigh, a lobster would scream and a cat would purr when in pain.
Well different animals have different languages for example a lion roars.Additional:Coyotes for example make forty different and distinct sounds. When they cry and howl, they combine these in different ways. Incidentally, human language makes forty distinct and different sounds that we combine in different ways.