Rabbits do not have vocal cords and are mostly completely quiet

16 Animals That Make No Sounds (Why They Are 100% Silent)

In Fun Facts by Morten Storgaard

Not all animals make sounds. At least not sounds that are audible to the human ear. Let’s take a look at which animals we find that do not speak at all or make any noises.

Which animals make no sounds?

  • Jellyfish
  • Snails
  • Butterflies
  • Crabs
  • Sharks
  • Goldfish
  • Sea Urchins
  • Worms
  • Starfish
  • Sea Cucumber
  • Sea Anemones
  • Sponges
  • Clams
  • Sea Lilys
  • Sea Squirts
  • Man O’Wars

These are animals that will not communicate using their vocal box or mouth.

There are some really amazing facts to look into here!

Let’s get to it and see how and why these animals get through the day without any sounds at all.

We also have some animals that are super-quiet predators. They can surprise any animal because they are silent as a ninja.

But let’s start by looking at some of the animals that make no sounds through their mouth.

These Are The Animals That Make No Sounds

Let’s start with clarifying that we are talking about sounds made through the animal’s mouth.

I think all animals can produce sounds if we are talking about mechanical sounds as they move, eat, or fight.

But we are strictly talking about calls and other sounds made through the mouth in order to communicate with other animals or to express pain etc.

Giraffes makes no sounds at all they have no vocal cords

Let’s take a closer look a some of the silent animals that will not or cannot make sounds.

The Jellyfish is completely silent

There’s a good reason why the jellyfish doesn’t make any sounds.

You probably know this is you like to swim in the ocean. The jellies can be fun to look at but some of them can sting you. So it would be better if they were not completely silent.

But they are.

Jellyfish are very simple creatures and they belong to the list of animals which don’t even have a brain. This also means that they are not capable of producing any form of communication.

They just float around and feed.

Jellyfish are completely quiet. They have no vocal cords

Worms are also silent

Worms do not communicate with each other by using sounds.

So in order to communicate they will use touch and taste. They can feel vibrations very well (in the soil) and whenever they feel the earth tremble they will quickly move upwards to the surface. They will do so in order to avoid getting caught by an enemy.

But after all, worms life most of their lives in the grounds or under rocks and stones so why would they not be silent anyway. There’s nobody to talk to underground anyway.

Sea Urchins make no sounds

Sea Urchins don’t communicate with their mouth. In fact, they don’t even have a brain either (just like the jellies).

Sea Urchins are very simple animals which can only move around and feed.

So there is no communication passing through its mouth. The only sound you will hear from this animal is the tiny legs walking on the little pebbles at the bottom of the ocean (or in the aquarium).

Sea Urchins will eat algae off the rocks and they can do so very silently. But you may hear some tiny scratching sounds if you are completely silent around it. That will be the teeth grinding the algae!

Do Fish Make Sounds?

most fish are quiet but some can make a few sounds

You would think that fish are totally silent in general.

But you would be wrong.

There are actually many types of fish which can utter vocalizations. Your goldfish is not one of them but let’s take a look at some of the fish sounds in the ocean.

According to the marine scientist Shahriman Ghazali from the University of Auckland, all fish can hear and some can also make sounds through the mouth. But they don’t have any vocal cords so they make weird sounds!

Fish sounds are best described as chirps and grunts and they will make these sounds in order to communicate and express dominance, fear, or pain.

Fish will make sounds in order to communicate, mate, or warn other fish of predators.

Actually, the first person to describe fish vocalizations were Aristotle more than 2,000 years ago. Fish can make a drumming-like squeaking sound by vibrating its swin bladder. The other sound it can make sounds more like the sound you get from plastic rubbed on metal.

Biologists have been able to record these sounds with underwater mics. It’s hard to do because many fish are shy and will keep quiet (or swim away) when they see scuba divers so they had to be patient and wait.

Stingray is very silent

Do Animals Have Vocal Cords?

Most mammals have a larynx.

This is a hollow muscular organ used to pass air into the lungs. This is the muscle that holds the vocal cords. It is also called the voice box.

Birds, on the other hands, to now have a voice box.

Instead, they have what is called a syrinx. That is the voice organ of birds and it’s very well developed among birds like parrots and crows that sing (and speak) well. They can control this by pressing air through it and some birds can even produce more than one sound at the time.

For many smaller birds, the syrinx is not bigger than 1/3 of an inch (0,8 millimeter).

Very impressive.

What type of pet birds make no sounds?

Most birds can sing but some make no sounds

If you are looking for a pet bird which keeps quiet you have several options.

As we just above, birds are wonderful singers and songbirds can even do several sounds at the same time. This doesn’t mean that we don’t have any exceptions.

We also find birds which cannot make any sounds.

  • Parakeets
    have been observed to often sit quietly. They look like tiny parrots but they are much easier to care for and they are also smaller and definitely quieter.
  • Canary birds
    The Canary birds can definitely sing and they really sing beautifully. But often they will keep quiet and they are a good option if you want an animal that doesn’t make much noise around you.
    You will have to choose a female Canary as the males are most known for that beautiful singing.

Canary birds are some of the most quiet pet birds

Other than that, you should expect older birds to make fewer sounds than young birds. As they get older they tend to sit more quietly and relax their syrinx (bird’s voice boxes).

Animals That Can Move Silently (Like Ninjas)

Some animals can make sounds but can also choose to be extremely silent when they have to.

These are often predators of the dark. You will know what’s coming for you if you are hunted by these amazingly effective predators. They can move without a sound!

A good example of this is the owls.

Owls can be super-silent

Owls are quiet predators. They hunt in complete silence

They can fly over their prey without making any sound at all. This is due to their perfect aerodynamic shape which means that the wind will not make any sound when passing by its wings.

This is especially smart for that owls because they hunt by listening to every sound in the forest.

There’re faces are shaped in a way that they can pick up any small sound made in the forest.

Whenever they hunt they will hover over the forest silently and completely undetected. As soon as it picks up any sound it can dive down and catch a mouse or other little creatures.

The Shark is no chatterbox either

Sharks are the silent predator of the sea. It has special scales that are silent

Sharks are exceptional hunters and they are also one of the quietest animals at sea.

They have very special scales which enables the water to flow by without making any sound whatsoever. This makes then the super predator of the sea and animals will never know what’s coming when the Shark is approaching.

Because there is almost no friction between the Shark in the water they can swim super fast. This is another benefit for the shark.

Not only can it move super silently – but it can also swim faster than most other fish!

Scientists have actually started those special scales. They have been used as inspiration for spatial swimming suits which gives the swimmer a great advantage. 

Which Animal Does Not Have Vocal Cords?

Rabbits

Rabbits do not have vocal cords and are mostly completely quiet

Rabbits actually have no vocal cords. But that does not mean that they are completely silent at all times.

A stressed out rabbit can make some pretty terrifying grunting sounds that sound like it is in pain. But most of the time it will just sit quietly and do its business.

Rabbits will produce some mecahincal sounds from eating carrots etc. but you won’t hear it make any sounds from the mouth.

It’s not possible without the vocal cords.

Giraffes

Giraffes also have no wool coat court and produce no sounds through the mouth.

This is pretty amazing when you think about its size. After all, it is the worlds tallest animal!

Does this mean that the giraffes cannot communicate with each other and with their little ones? No. They can do infrasonic sounds which are sounds inaudible to the human ear.

They are way too low-pitched for the human ear to pick it up.

Biologists have been able to pick up the sounds with microphones and computer. When the computer systems analyzed the sounds they found that the sounds were extremely low-frequency. Low-frequency sounds can travel over big distances which are perfect for warning calls.

They can also do a whistling type of sound in order to call upon their kids.

Snakes

Snakes are silent and makes no sounds

Snakes are another category of animals who did not process vocal cords.

As you probably know, snakes will do a hissing and rattling sound to let you know they are approaching. This hissing sound is not produced through vocal cords.

But as with many rules, there are exceptions.

The Pine Snakes have local chords so they can make several sounds. But most of the time they won’t. They will be quiet and silent just like other snakes and they will not utilize their special ability.

Snails

Snails are quiet and will not make sounds

Snails are as silent as they are slow.

Snails names are also created without vocal cords.

If you hear any sound from the snail it will be the sound of it retracting itself back into its house. Or maybe it is eating and you can it feed on the leaves.

So as you can see these sounds are more mechanical of nature. They do not speak or do any audible sounds with their mouth.

But when was the last time you heard a snail creeping up on you anyway?

Owls are very silent hunters. They can fly very quietly

Sources: sciencing.com, nature.org

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