1. click
   bark
2. growl
   roar

Dolphins rank among the most intelligent animals, so it's no surprise that their communication skills are top-notch. The more than 40 species of dolphins live in groups of less than ten to several hundred, and many use clicks to communicate. Like bats, dolphins use echolocation to track down prey while hunting.

1. mew
   oink
2. caw
   neigh

Pigs are vocal creatures, communicating with oinks, grunts, snorts and squeals. And if you think these gentle creatures are dirty, think again! Pigs are naturally very clean animals. If you see one covered in dirt or mud, it was probably trying to stay cool, because pigs can't sweat to cool down like humans can.

1. cluck
   mew
2. honk
   gobble

Yes, turkeys do gobble on, but their real skill is speed! Turkeys can run up to 25 mph, or fly in excess of 55 mph. Want some more bizarre turkey trivia? You can distinguish the poo of a male bird from a female one just by looking at it; while males leave behind spiral scat, females produce hook or j-shaped waste.

1. bleat
   laugh
2. chirp
   buzz

Ever wonder why social media giant Twitter uses a bird in its logo? It's because birds love to tweet! They also chirp, warble and sing. Descended from dinosaurs, there are more than 10,000 different species of birds living today, from the mighty ostrich to the tiny hummingbird.

1. hiss
   caw
2. nicker
   squawk

Snakes aren't exactly social creatures, so while they do hiss, they aren't doing it as a way to talk to their snake buddies. There are more than 3,000 species of snakes, from the tiny thread snake to the mighty python - which can grow more than 30 feet long!

1. meow
   bark
2. moo
   roar

Sea lions are noisy marine mammals, known for their loud barks - similar to the ones a dog makes. Their close relative, the seal, may look similar, but prefers to communicate using soft grunts rather than the attention-grabbing barks of the sea lion.

1. trill
   maa
2. bray
   trumpet

Raccoons can produce anywhere from 50 to 200 or more different sounds, depending on who you ask. The purr is common, as are putters, snarls, hisses and whimpers. Baby raccoon noises tend to resemble those made by a kitten, and may include mews, cries and whining.

1. coo
   squeak
2. chirp
   caw

Ravens and crows are both black, intimidating birds, but when they open their mouths, you can usually tell them apart. While crows make a very distinct caw sounds, the raven's caw is deeper and more of a guttural sound - sometimes written as "kraaw" or "kraa" rather than "caw."

1. buzz
   laugh
2. honk
   squawk

As if the threat of an itchy bite weren't enough, mosquitoes have yet another way of ruining your picnic - their buzz! When mosquitoes are flying, their rapidly beating wings create a droning buzz that is usually only audible when the insect has seriously started to invade your private space. While all this buzzing sounds the same to humans, male mosquitoes can actually recognize a female simply by her sound - which is slower and has a lower pitch than the buzzing of a fellow male.

1. cluck
   coo
2. scream
   howl

Pigeons produce a surprising variety of sounds. They may coo to attract mates, or to defend themselves or their territory. Baby pigeons snap their beaks or hiss, while males stamp their feet and loudly snap their wings as a show of aggression.

1. hoot
   hee-haw
2. roar
   mew

The most common owl sound is a hoot, or a hiss when things aren't going well. Some species of owls also produce noises you might not expect. The great horned owl makes a sound like a muted foghorn, while burrowing owls say coo-cooooo. Barn owls scream, and screech owls earned their name through some seriously high-pitched screeches.

1. bark
   purr
2. roar
   meow

Despite their name and their dog-like bark, prairie dogs are rodents. They live in burrows underground and are about the size of a rabbit. Early American explorers Lewis and Clark actually referred to these creatures as barking squirrels in their writing.

1. bleat
   chirp
2. nicker
   growl

You only have to end up with a grasshopper trapped somewhere in your home one time to memorize its sound - a repetitive and annoying chirp. The male grasshopper makes this noise by rubbing a ridge along one wing against some wrinkles on the other wing. And yes, you can calculate the temperature based on grasshopper chirping frequency.

1. hiss
   gobble
2. caw
   squeak

Mice produce small squeaks that humans and other animals can hear, as well as ultrasonic sounds that are beyond the scope of human hearing. Depending on the frequency of pitch of mouse sounds, the creature could be indicating excitement, fear, pleasure or danger.

1. honk
   cluck
2. chirp
   whinny

Geese give mighty honks when talking to other geese or warning humans and other creatures to stay out of their way. Some scientists postulate that geese who honk when flying in formation might be doing so as a way to encourage one another to keep going and not give up.

1. moo
   baa
2. oink
   chirp

Sheep communicate with a bleating sound, or baa. The noise produced by goats is similar, but is often shown as maa, rather than baa. And in case you were wondering, some sheep are awesome singers. Look no further than a 2013 viral video of a sheep belting out Taylor Swift's "I Knew You Were Trouble."

1. laugh
   scream
2. singing
   bellow

Spotted hyenas are known for their laugh, but the animals themselves are not laughing because they find something funny. A hyena's laugh is a sign of frustration, competition or tension - and that's no laughing matter.

1. chirp
   roar
2. neigh
   meow

Horses are known for their neighs, which they may use to display anything from worry to excitement. These gentle creatures also use soft nickers as a form of greeting, snorts and blows to show excitement, and sighs to communicate relaxation.

1. breaths
   roars
2. screams
   chirps

Rhinos use a special form of "Morse Code," in which they vary the length and spacing of their breaths to share messages with one another. They may also bellow, snort, grunt or make a trumpeting sound like an elephant.

1. purr
   squawk
2. roar
   growl

Parrots are famous for their mimicry, which means they can replicate human speech - but that doesn't mean that they are talking the way humans do. Sure, they can manipulate the muscles around their trachea to produce words, but they have no vocal cords, so standard speech is impossible. Instead, most parrots communicate with squawks, clicks, shrieks and clicks.

1. roar
   scream
2. honk
   hum

Giraffes have a larynx, but for a long time, scientists thought their necks were way too long to actually produce sounds. A 2015 study published in the journal Biomed Central revealed that these gentle creatures actually do "speak" - through low-frequency, rumbling hums, and only at night.

1. caw
   ribbit
2. roar
   bugle

There's no mistaking the bugling sound of a male elk with the call of any other creature. A 2006 study in the Journal of Mammalogy suggests this bugling is used to maintain motivation-structural rules - the silent rules that govern elk society.

1. chirp
   cluck
2. quack
   honk

When it comes to ducks, female mallards are the noisy ones, emitting sounds in a series of two to ten quacks, while males tend to have raspier, shorter quacking sessions. Other species of ducks don't quack, but instead communicate with squeaks, whistles and croaks.

1. meow
   moo
2. neigh
   cluck

Cows and cattle are known for their braying moo, but may also make snorting, grunting or bellowing sounds. Female cows tend to be louder and more aggressive with their sounds when separated from the calves, while the baby cows themselves produce high-pitched bleats.

1. cluck
   coo
2. squawk
   meow

Chickens make a distinctive clucking sound, which is generally used as a means of everyday communication. A crowing rooster is saying "Hey, look at me!" while a kuh-kuh-kuh sound demonstrates excitement. Baby chicks are limited to simple peeps and trills until they are a bit older.

1. bark
   trumpet
2. roar
   hum

An elephant's trumpet can be loud enough to be heard several miles away, and may indicate anything from danger to anger to excitement. Elephants also have interesting non-verbal communication - they hug with trunks or rub their bodies together to show affection.

1. purr
   whistle
2. roar
   bark

Dogs have tons of ways of showing their feelings. They rely heavily on scents, as well as body cues like how they hold their ears or tail to show what they are thinking. In terms of "words," dogs may bark, howl, growl, yip or yap, depending on the breed.

1. chirp
   scream
2. purr
   meow

Many monkey species are known for their screams and screeches, which can indicate anything from anger to excitement. Scientists who've studied monkeys suggest that these close human relatives should be able to talk - their vocal tract appears to be similar enough to a human's to produce words. What keeps them from having full spoken conversations is their brains - which don't have the neural control to produce sounds in the way that human brains do.

1. hee-haw
   oink
2. moo
   neigh

The donkey's sound is known as a bray, and is written hee-haw. These creatures may also communicate using grunts, growls or snorts, but they don't neigh like their horse kin.

1. croak
   click
2. meow
   cluck

Cats make three basic types of sounds. Some, like purrs and trills, are produced with the mouth closed. Others required the cat to open his mouth and eventually close it, and may include meows of varying pitch and intensity. Finally, the cat can make noises that require its mouth to stay wide - like a hiss, growl, shriek or snarl.

1. purr
   meow
2. croak
   roar

The king of the jungle communicates using a mighty roar - but it can't purr. The very cartilage in its larynx that allows for roaring rules out the ability to purr like a kitten. The only big cat capable of purring is the cheetah. which is also known for chirping rather than roaring.

1. buzz
   whine
2. grunt
   click

Believe it or not, bees can buzz even when their wings are still. Some buzzing sounds come from the flutter of the critter's wings, of course, but other buzzes come from the bee simply vibrating his wings or part of his body to show aggression, or during pollination.

1. goo goo gajoob
   grunt
2. squeal
   oink

The walrus communicates in grunts, whistles or clicks. Despite what you may have heard about goo goo gajoobing, this sound has nothing to do with the walrus.

1. growl
   mew
2. purr
   trumpet

If you're within earshot of a bear, you're probably too close, so take our word for it: a bear communicates with roars or growls, and may huff or pop its jaw when threatened or nervous. Cubs communicate with small groans and squeals, while mother bears may use simple grunts to keep their young safe.

1. roar
   purr
2. ribbit
   honk

Female frogs make small peeps if they speak at all - but male frogs have plenty to say. Using a large air sac below their mouths, they can ribbit, croak, grunt or whistle, depending on their moods.