The Curious Sleep Habits of Animals (World Sleep Day Bonus)

Gets sleepy is a production of somber studios and is made possible thanks to ...

support of our sponsors and premium members. If you'd like to listen at free and access

“weekly bonus episodes, extra long stories and our entire back catalogue, you can try”

out premium free for seven days by following the link in the episode notes. Now, a quick word from our sponsors. A big thank you to Coup Sleep Goods for sponsoring this show. As I've said before, I absolutely adore my Edompello from Coup. It really has been a

game-changer in how comfy I feel when I lie down in bed, helping me sleep without much

better each night. Finding the ideal pello can be difficult, but with the customisability of Coup's pillows, where you can easily undo the zipper and either reduce or increase the amount of soft memory foam fell inside. You'll be able to get things just right for you. I've actually found that the way the pillow came when it first arrived in the post is pretty much perfect for me, but it's lovely to know I can adjust this whenever I like

as time goes on. You spend about a third of your life in bed, so choosing the best comfort while you're there is a no-brainer. Let Coup help you show up feeling rejuvenated and ready

“to go. Get 20% off your first order and try Coup risk free with a 109 sleep better guarantee”

at Coup Sleep Goods.com/getsleepy. That's C-O-O-P sleepgoods.com/getsleepy. [MUSIC] [MUSIC] [MUSIC] [MUSIC]

[MUSIC]

Hey everyone, happy world sleep day.

And welcome to Get Sleepy. When we listen, we relax, and we get sleepy. [MUSIC] I'm your host Thomas. Thanks so much for joining me for this very special bonus episode

to celebrate world sleep day. [MUSIC] Tonight's story explores the fascinating ways in which some animals sleep.

You probably know that some creatures like wolves and

devs are nocturnal and tend to sleep during their day. But did you know that others like dolphins and birds sleep with only one half of their brain activated? Well, at some birds sleep while gliding in the sky. While others quite literally sleep with one eye open.

[MUSIC] Well, we have some interesting facts to share about the curious sleep habits of animals. As we take you on a journey from the Serengeti planes to the Canadian Tundra and beyond.

[MUSIC] Thank you to Ivan for writing this wonderful tale, which

“I think you're going to adore listening to.”

I have the pleasure of reading it for you. [MUSIC] So, let's take a moment to settle in. [MUSIC] Try making room in your mind for tonight's story.

Letting go of any thoughts or distractions. [MUSIC] Take a deep breath in through your nose. [MUSIC] And let it out through your mouth.

[MUSIC] Once more in and out. [MUSIC] Now imagine a place where much of the soil is coppery red, and the sunsets are a fiery orange.

[MUSIC] You might be picturing a desert landscape, but this description also fits the lush plains of East Africa.

It's a vast and varied region,

where thousands of animal species roam freely.

And this is where our story begins. [MUSIC] [BLANK_AUDIO] [BLANK_AUDIO]

“The Tanzanian wild is a beautiful place.”

It's home to Mangrove forests, waterfalls, and savannas. Each with unique flora and fauna. [MUSIC] In the north of the country near the border with Kenya, the serangate plains are particularly striking.

[MUSIC]

Here, grasslands sprawl in numerous colors,

from green and gray to gold and copper, swaying in the breeze. [MUSIC] Blue wildebeest gazelles and other herbivores, migrate across the plains in great numbers. [MUSIC]

And the tallest mountain in Africa,

“Mount Kilimanjaro, source nearly 20,000 feet in the sky.”

[MUSIC] On this particular dawn, the giant Ambeuke of the Sun cuts through the horizon in a slow rise. It hangs near Mount Kilimanjaro's snow-covered peaks. [MUSIC]

The snow shimmers in the Ambeuke, as though the mountain is laden with jewels. [MUSIC] A thick skirt of clouds surrounds the mountain, like the rings of Saturn.

[MUSIC] The Akisha trees at the foot of it are silhouetted against the vibrant sunrise. The trees stand tall and thick, finding out like umbrella pines.

[MUSIC]

“The Serengeti is renowned, not only for its breathtaking scenery,”

but also for its remarkable wildlife. It's a place where massive elephants lumbering baboons and striped sebrist wow. [MUSIC] One of the most iconic animals found in this region

is the powerful and stealthy lion.

Often considered the symbol of Africa. [MUSIC] Lions of the Serengeti make their home anywhere they can find shade. In this sense, the area surrounding Mount Kilimanjaro is as good as any. [MUSIC]

During the day, the Akisha trees cast shadows over the red earth, offering places of refuge. But there are also rocky outcroppings, known as copies, where lions make their permanent homes. [MUSIC]

Copies were formed by volcanic activity millions of years ago. They look like gray boulders, sprouting green bushes and trees. [MUSIC] One lush copy near the foothills of Kilimanjaro

is home to a large pride of lions. [MUSIC] The highest rocks provide the perfect vantage for the lions to survey the area. While the dense thickets of vegetation offer shade and shelter

from the hot African sun. Lions need a lot of rest to conserve their energy for hunting. They tend to rise at dawn after a good night's sleep.

This particular pride consists of short-coded lionesses,

long-maint lions and their cups,

“all sheltering amid the rocky and verdant out crop.”

[MUSIC] As the sun rises, they let out a few lazy yorns, and stretch downward dog style on the terrace rocks of the copy. [MUSIC] Once they've stretched, they begin grooming themselves and each other,

preparing for their day ahead. [MUSIC] The lionesses follow the strongest and most experienced female hunter, known as the matriarch. [MUSIC]

There she is, a fierce and majestic creature, standing on the tallest rock. [MUSIC] Her ears are slightly mousey and alert. While her expression is serious and wise,

as she surveys her territory,

“keeping a watchful eye on the rest of the pride.”

[MUSIC]

Her powerful muscles ripple under her golden fur.

She commands respect and admiration from the other big cats. [MUSIC] The matriarch descends the copy, balancing on her haunches as she moves down each boulder. She steps over several male lions with big,

very mains, some bathing in the soft, eastern sun. [MUSIC] These lions must stay behind to protect the cubs and the territory, while the lionesses are away, hunting. [MUSIC]

When the matriarch reaches the base of the copy, she joins the rest of the lionesses,

who've been patiently waiting for her to lead them.

[MUSIC] They are ready to hunt,

“and the matriarch cleeds the way through the plains.”

[MUSIC] When the females return with food for the pride, it's still early in the day. [MUSIC] Lions are most reactive at dawn or after dusk,

when the air is cooler. [MUSIC] Once they've eaten, the adult lions gather the cubs, and seek shelter from the intense sun.

[MUSIC] As the sun moves west, the lions emerge from the thickets hanging to the rock. [MUSIC] Second venting the copy,

they chase the shadows cast on the dusty earth. [MUSIC] When they settle in a patch of shade, the adults lie on their backs, and watch the cubs play.

[MUSIC] Some pounce on each other, while others practice their roles. [MUSIC] Now as later,

the cute cubs are napping peacefully in the shade. [MUSIC] Their soft fur rises and falls with each breath. [MUSIC] Meanwhile,

some of the adult lions remain vigilant over the plains. Staying cool by shifting positions in the shade. [MUSIC] A strong breeze ruffles their mains. Their noses detect the musky scent of nearby animals.

None of which pose a threat. [MUSIC] For most of the afternoon, the lions simply rest. [MUSIC]

They begin to stare at twilight, as a flock of graceful pink flamingos,

Flyers in formation against the dimming sky.

With night approaching, the temperature drops,

“and the copy's green vegetation graze over.”

More often than not,

the lions will spend much of the night hunting.

They have impressive nocturnal vision, and it's easier for them to catch their prey in the dark. [MUSIC] But on this particular night, the lions will rest.

They'll need their sleep to recharge for another day of hunting, playing, and bonding as a family. [MUSIC] While the lion's sleep,

“another species is just getting started for the day.”

They live in the Yukon territory of northwestern Canada,

which couldn't be more different from the African Serengeti. [MUSIC] There are no bareback trees, or hurts of wildebeest roaming the Yukon. Instead, of a variety of landscapes

from valleys bracing with evergreen, to rocky mountain ranges, stretch out as far as the eye can see. [MUSIC]

This stunning, untamed region of Canada,

the gray wolf prounds. Also known as the Canadian Timberwolf,

“these wondrous creatures are the largest members of the Canine family.”

Adult males can measure up to six and a half feet long. It all is many professional basketball players. With more than 50,000 of them, Canada is home to the world's largest population of gray wolves. Their hounds can be heard echoing through the forests beneath the blue moon,

adding to the Yukon sense of wonder. [MUSIC] The pack of wolves were visiting today, resides in the Yukon's far north near the Beaufort Sea. [MUSIC]

They live in a forest clearing surrounded by tall pines. There are five gray wolves in this pack, and they're preparing for a night's prayer. They love the snow that crunches beneath their paws. As they move, their legs and belly seem like an extension of the snow.

They're undersides up your white. Their backs and sides, however, are Heather Gray, shot through with black. It's the perfect camouflage for the areas rocks and gravel. [MUSIC]

Up here in the far north, winter gives way to the darkest nights of the year. But tonight is different. The sky overhead is clear and studied with stars. [MUSIC]

Then something extraordinary happens. The stars begin to fade and a green glow illuminates the sky. The wolves look up at the Aurora Borealis. It's green ribbons undulating in the night sky. They begin to haunt as if singing a song to this magical sight.

[MUSIC] It's a mesmerizing spectacle. And for a moment, all is still and peaceful.

[MUSIC]

But it is night time.

“And so, the wolves must patrol their stronghold”

and search the snow-covered landscape for food.

[MUSIC] The northern lights continue to dance overhead as the wolves pat gingerly through the forest. [MUSIC] The silence is only broken by the occasional crunch of snow beneath their paws,

or the hooting of owls in the tree tops. [MUSIC] Wolves, like the hooting owls, have excellent nocturnal vision, and a most active overnight.

[MUSIC] The wolves may not encounter prey on any given night,

but they know better than to split up to improve their odds.

[MUSIC]

“It's essential that the pack remains together”

for the next eight hours or so. [MUSIC] Wolves are at their strongest when they were compacts, ensuring their survival. [MUSIC]

These wolves, with their keen senses and strong instincts, communicate through yipping, whining, and licking each other. [MUSIC] The alpha, or pack leader in this particular group, isn't the largest.

[MUSIC] His legs are shorter than the others, and his coat is a darker shade of gray. [MUSIC] But as he leads them through the forest,

there's an assertiveness to his pace,

“as if he could command any room upon entering it.”

[MUSIC] His torn eyes are shrewd and calm, as if they hold ancient knowledge, and his demeanor, like the lioness matriarch from before,

exudes confidence. [MUSIC] Owls later, having traversed a large section of the forest, the pack retraces its steps. [MUSIC]

The wolves follow their tracks through the snowy forest floor, back to the clearing. [MUSIC] A strong wind whips the snow up to their paws, while owls keep hooting in the tree tops.

[MUSIC] The wolves return to their home empty-handed,

but there's always tomorrow night.

[MUSIC] It's almost six a.m. and in some parts of the planet, the sun is rising, painting the sky in vibrant shades of orange and pink.

[MUSIC] But in this part of the world, winter holds its grip, and the pack prepares for sleep. [MUSIC]

Due to their thick layers of fur, wolves can survive in freezing temperatures. [MUSIC] This morning, in the gravely light of dawn, the pack of fives snuggles up near the base of a pine tree.

[MUSIC] They curl into balls beside each other, generating a shared warmth. [MUSIC] Their bodies expand and contract rhythmically with each breath.

[MUSIC] Their eyes are heavy, opening and closing, as snowfall envelops them. [MUSIC] The wolves are tired,

but they embrace their drowsiness, resting peacefully in nature's cradling arms. [MUSIC] While the wolves sleep,

The Canadian tundra becomes snowier,

with crystalline flakes falling from the sky.

[MUSIC] The wolves are happy here, but some creatures, like dolphins,

“prefer a warmer habitat this time of year.”

[MUSIC] And what better place for a happy dolphin than the warm waters of the Bahamas? [MUSIC] Located in the Atlantic Ocean,

about 50 miles east of South Florida, about 700 low-lying islands that rest on a vast limestone shelf. [MUSIC]

This region is known as the Bahama Banks.

Inspired by the surrounding shallow sea, the Spanish named it Bahama in 1492, meaning low sea. [MUSIC] These tech-wise waters provide excellent visibility

and protection from large predators.

“Making them ideal for some of the most intelligent creatures”

in the world at Atlantic spotted dolphins. [MUSIC] As their name suggests, these carefree swimmers have sleek platinum skin, adorned with black spots.

They adore the warm temperatures and tropical waters of the Bahamas. [MUSIC] They travel in parts of five to 50, exploring the sea grass medows of the Bahama Banks.

[MUSIC] These medows are characterized by long stalks of yellow grass that sway in the water as they were constant breeze blows over them. [MUSIC]

“The dolphins swim playfully and communicate”

with a wide range of whistles and skills. [MUSIC] In this serene and secluded spot of paradise, small hills of chalk-white sand, poke out of the water,

forming sand bars in the middle of the sea. [MUSIC] The midday sun shines high in the sky, heating the shallow limestone corridors beneath the water's surface. [MUSIC]

There's a small part of spotted dolphins here, ready to take an afternoon nap. [MUSIC] But there's an issue. These creatures are very light sleepers.

[MUSIC]

Dolphins must always remain alert,

especially if there are any boats nearby. They are hypersensitive to sounds, which move about five times faster in water, land in air. [MUSIC]

To stay alert, dolphins have a unique way of sleeping, where only one half of their brain rests at a time. [MUSIC] Known as uni hemispheric slow wave sleep, this helps them remain vigilant while floating on the surface.

[MUSIC] But it also means they can be easily awakened by minor disturbances in the water, such as a changing currents or waves. [MUSIC]

If understood, however, dolphins can sleep up to two hours at a time. [MUSIC] Luckily, they can function well with just a few hours of sleep, swimming side by side, and jumping or breaching in wide arcs above the surface.

[MUSIC] One animal that doesn't thrive on little sleep,

Lives thousands of miles away in Russia.

[MUSIC]

In this corner of the world,

“the region of east Siberia sprues across a few million square miles.”

[MUSIC] It encompasses a vast wilderness of snow-covered terrain, glassy lakes and divers wildlife. [MUSIC] It's also home to a 1200 kilometer peninsula called Kamchatka.

[MUSIC] Kamchatka boasts ski resorts, hot springs, and more than 300 full canos. [MUSIC]

It also has a significant population of brown bears,

with around 15,000 living there. [MUSIC] The brown bears of Kamchatka are magnificent.

“Their coat is a shiny shade of milk chocolate brown,”

with button-like eyes to match. [MUSIC] Standing on their hind legs, they can reach over nine feet. [MUSIC]

Despite their enormous size and strength,

brown bears are fairly agile.

They can run its speeds of up to 30 miles per hour. [MUSIC] In Kamchatka, brown bears take shelter in the peninsula's dense forests, emerging from their dens to feed on salmon at a nearby lake or stream. [MUSIC]

They hibernate for up to seven months each year,

“which helps them conserve energy during the harsh Siberian winters.”

[MUSIC] In the warmer months, however, they lead us somewhat active lifestyle. They roam the land freely, searching for food, and bathing in frothy rivers. They're also pretty good tree climbers,

and enjoy running through the wilderness with their cups. [MUSIC] These morning activities, swimming, climbing, and running, can work up and up a tight. [MUSIC]

The luckiest bears on their cups may find themselves feasting on tree bark, berries and fish, a lunch. [MUSIC] Afterwards, they might retreat to their caves, or rest at the base of a pine tree,

weighed down by a feeling of sluggishness. [MUSIC] When this happens, a long nap might be an order. All the bears might float lazily down the river, happily satisfied.

[MUSIC] But for hungry brown bears, there is hardly any rest during the day. They can spend up to 16 hours a day, searching for food. Around 10 p.m., the bears return to their caves, exhausted.

Whether or not they found enough food to satisfy their enormous appetite. [MUSIC] With nothing more to do, they call it a night. Settling down for a long and well-deserved rest. [MUSIC]

Over the course of the night, they may shift into different sleep positions, lying on their backs or stomachs, or sleeping on their sides. [MUSIC] When they're not hibernating, brown bears usually sleep for several hours per hour. Every hour is per day.

And after resting, they take their time to stretch and yarn, before starting their search for food once again. [MUSIC]

Although bears may be sluggish at times,

they are not sliver than say a giant tortoise walking on the beach,

or a banana suck, slithering up a tree. [MUSIC]

“And other animals are even sliver and sleepier,”

than tortoises and slugs. [MUSIC] Take the two-toed south of the Amazon rainforest, for example. [MUSIC] These very brown creatures spend their lives in the tree tops,

moving at a snail's pace from branch to branch. [MUSIC] It's where they eat, sleep, mate, and even give birth to their young ones. [MUSIC]

Because of their slow movement,

sloths were named after a word, meaning laziness or sluggishness. [MUSIC] Given that,

“you'd think they'd have enough energy to stay awake during the day.”

[MUSIC] But because of their slow metabolism and low body temperature, sloths spend most of their time resting. [MUSIC] Until recently,

it was thought that these animals slept for more than 15 hours a day. [MUSIC] But scientists now think that sloths in the wild, sleep for around nine to ten hours.

They're not all at once. [MUSIC] Instead, they take frequent naps that can last anywhere from a few minutes to a few hours. [MUSIC] Sloths also have an interesting way of sleeping.

[MUSIC]

“They hang upside down using their long claws to grip the branches.”

[MUSIC] Specialized tendons in their hands and feet lock into place, preventing them from falling. [MUSIC] This enables them to sleep safely and comfortably,

while suspended in the air. [MUSIC] Some adults even sleep with a cute little baby soft on their bellies. [MUSIC]

Other animals, such as great frigate birds, also have unique sleeping patterns. [MUSIC] These birds resemble large ravens, with glossy black feathers and forked tails.

[MUSIC] But upon closer look, they couldn't be more different. [MUSIC] They sport a curved grey beak and an impressive wingspan. [MUSIC]

Males have a red sack on their breasts, which expands like a balloon when it fills with air. [MUSIC] Great frigate birds can be found soaring over the Indian and Pacific oceans,

flying for days or even weeks at a time. [MUSIC] Like dedicated road trippers, these birds prefer to cover long distances, non-stop. [MUSIC]

This is why they sleep in 10 second bursts.

[MUSIC] Soaring high in the sky, they engage only half of their brain to keep them gliding as they dose off. This is similar to the uni hemispheric sleep

of the Bahamas spotted dolphins. [MUSIC] On land, you might think that frigate birds would take advantage of the opportunity and enjoy a longer sleep session.

[MUSIC] But even when they're touched comfortably on a tree branch or a rock, they tend to sleep in short bursts, about a minute at a time,

Adding up to around 12 hours a day.

[MUSIC] Once they're rested, they fly onwards,

ready to cross the next ocean.

[MUSIC]

“Another bad who's sleep habits say unique,”

is the mallard duck. [MUSIC] One of the most famous duck species, mallards are known for their vibrant, contrasting plumage.

[MUSIC] The males iridescent green head, yellow bill, and white-banded neck. Make it one of the most easily identifiable duck species. [MUSIC]

Mallard ducks live in a variety of habitats, from wetlands and ponds,

to parks and urban areas.

[MUSIC] During the day, they watered around looking for food. While they might rest near a lake, preening their feathers,

“or dipping their orange webed feet in the water.”

[MUSIC] Mallard families enjoy exploring their surroundings. [MUSIC] They usually form a line, led by the mother duck,

and walk in an untidy row. [MUSIC] But after a while, they grew tired. [MUSIC]

Depending on where they are,

they might do's off, standing in a row. [MUSIC] The ducks at the end of the line, sleep uni hemispherically, with one eye open,

to remain alert in case potential predators are lurking nearby. [MUSIC]

“This slew wave semi-alert state of sleep”

isn't the only remarkable thing about how different animals survive in the wild. [MUSIC] Similar to hibernation, some creatures experience a prolonged state of dormancy,

induced by hot and dry temperatures. [MUSIC] Think of summers in the American Southwest, where rocky slopes burst with yellow flowers, and two saguaro cacti,

where floral crowns are top their many limbs. [MUSIC] The American Southwest is where the sonoran and Mahave Deserts converge. [MUSIC]

Pink sunsets are a common sight, and so are meteor showers at the peak of summer. [MUSIC] The local fauna here is just as interesting. [MUSIC]

Does its snails crawl slowly over the arched and cracked soil, subsisting on plants? [MUSIC] Their showers are often bleached white

by the desert sun. [MUSIC] During dry scorching summers, they enter a long dormant state known as Estovation. [MUSIC]

This phenomenon is essentially the summer version of hibernation. [MUSIC] Desert snails, plenty of which thrive in California's arid deserts, undergo estovation to protect themselves from the extreme heat.

[MUSIC] Before entering this state, they retreat into their shells, and seal off the opening with a slime barrier to conserve water.

[MUSIC] During estovation, they can be found wedged in rock crevices, or nestled in thick desert brush. [MUSIC]

Some snails can remain in a state of estovation for years. [MUSIC] In 1846, a desert snail,

Possibly from Egypt,

was added to the collection of the British Museum in London.

[MUSIC]

“Museum workers assumed that the snail was”

along dead, so they glued to the shell to a piece of cart, and put it away. [MUSIC] Four years later,

a zoologist working at the museum looked at the shell, and noticed a layer of mucous. [MUSIC] Upon closer inspection, he realized it might be a sign

that the snail was still alive. [MUSIC] When he submerged to the shell in warm water, the snail did indeed poke out its head. [MUSIC]

“The sleepy little snail was then given some leaves,”

and rehomed with a companion. [MUSIC] According to the zoologist, the two snails seem to live quite harmoniously together. [MUSIC]

This amazing snail may hold the record

for the longest sleep of any animal in history. [MUSIC] But if an award existed for cutesy, before time, it would have to go to otters.

[MUSIC] Otters are some of the most adorable animals on the planet. [MUSIC] Small teddy bear faces sport long white whiskers,

“and their furry brown or grey coats are often slicked wet.”

[MUSIC] This is because otters spend a lot of time in the water. [MUSIC]

Their fur is specially adapted to keep them warm.

[MUSIC] They are excellent swimmers. And can often be seen pattering on their backs. [MUSIC] Otters enjoy long swims in the deep, too,

where they can hold their breath for up to eight minutes under water. [MUSIC] They're also known for their playful behavior. Some of their favorite activities include sliding down muddy banks and belly flopping in the water,

or even summer-soulting. [MUSIC] After a long day of playing and swimming, some otters pair up. [MUSIC]

As they ready themselves for bed, they swim out in pairs, float on their backs and hold hands, or pause, so that they don't drift away from each other while they sleep.

[MUSIC] So imagine a bird's eye view of a couple of otters soundly asleep. [MUSIC] They are floating on the surface of the water, holding hands. [MUSIC]

They're very ballies glisten in the cool blue moonlight. [MUSIC] With each breath, their ballies steadily rise and fall. [MUSIC] The inky water supports them like a mattress.

[MUSIC] A few yellow leaves fall from an air by tree and land in the water. [MUSIC] The leaves make tiny wrappers, but the otters continue to sleep peacefully.

[MUSIC] Their dormant expressions exude a deep sense of happiness. [MUSIC] It seems that nothing can break their hold on each other. Not the currents that cause them to sway and bob on the water's surface.

Nor the hooting of the owls in the forest.

[MUSIC]

“This familiar sound, the night owl's hoot,”

is part of the soundtrack of our suburbs, farms, and cities.

[MUSIC] When night falls, it mixes with the wobbling of cicadas, the croaking of frogs, and the concept of crickets in the trees. [MUSIC]

“By the sound of it, there could be hundreds of night creatures,”

making music in the dark.

[MUSIC] But they remain unseen, hidden in the shadows, or up in the trees. [MUSIC]

As the wild creatures outside,

serenete their homes.

“Indoor pets, like cats and dogs, may prick their ears to listen.”

Or perhaps they won't, having grown indifferent to the music of the night. [MUSIC] Too tired to give it any thought. [MUSIC] Perhaps these dogs will curl up in their own cozy beds.

Or just lie on their sides on the floor. [MUSIC] Maybe the cats or dogs off on the window cell, or power contentedly on the couch. [MUSIC] Whatever the case, the night continues on with its symphony of sounds,

promising a deep and restful sleep to those who listen. [MUSIC] [BLANK_AUDIO] [BLANK_AUDIO] [BLANK_AUDIO]

[BLANK_AUDIO] [BLANK_AUDIO]