Image

Why Are Marsupials Found Only In Australia?

Take a look at global animal distribution and you’ll notice how each country in the world has a specific type or species of animal, that isn’t found anywhere else.

One such group of animals is the Marsupials – animals that possess a pouch which they use to raise their young in. Some of the best examples of Marsupials are kangaroos, koalas, possums and wombats.

When we think about marsupials, we always associate them with the Land Down Under. Why is it that marsupials are found only in Australia?

Okay, let’s take a moment to set the record straight. Marsupials aren’t found only in Australia. They are also found in South America, Central America and certain parts of North America & Southern Canada. The best example of an American marsupial is the Opossum

Possum 2
An opossum

Scientists believe that the first marsupials were actually born in South America and they crossed Antarctica to finally land on and inhabit Australia. This was 180 million years ago, when Australia, Antarctica and South America were a single super-continent called Gondwana. A common marsupial ancestor born in South America branched into two distinct species, with one residing in the Americas and the other migrating to Australia. Today, over 200 species of marsupials are found in Australia, 100 in South America and 13 in Central America – all descendants of the single American ancestor. 

Gondwana
A representative image of the ancient super-continent of Gondwana (image source)

So, the question we should be asking now is – “Why are a majority of the animals that are found in Australia, marsupial?” Or, a better question would be, “Why are so many marsupials still alive in Australia, when most of their American counterparts are extinct?” What makes Australia such a fertile ground for the birth (& survival) of so many marsupial species?. 

The answer can be two-pronged. One line of thinking states that the geography of the country-continent is the reason for a high percentage of marsupials in Australia.

Australia has been a landmass that has remained largely separate from other continents for millions of years. This meant, it was subject to weather and soil conditions that was completely different from what was found on other continents. In turn, this affected the type of plants that grew on the continent, which changed the diet of the Australian marsupials significantly from their American counterparts. The researchers who support this theory believe that the diet offered by Australia was more conducive to the development of the marsupial species as a whole, compared to the diet elsewhere.

The second theory is that, since Australia was largely and for a very long time secluded and protected from the invasion of foreign species, the marsupials of yore didn’t have much competition to face for shelter, food and water. Additionally, the predominantly marsupial population ensured the birth of more marsupials and over time, the continent was soon overrun by marsupials. 

On the other hand, the Americas blossomed with many distinct species of animals, leading to intense competition for resources and as a result, the extinction of many marsupial species. We need to remember here that marsupial babies are born underdeveloped due to the lack of a placenta. They need additional time compared to their placental or egg-born cousins to grow into strong & mature creatures. With so many threats lurking around and such few resources to be shared by thousands of animals, it was just a matter of time before the genetically-weaker marsupial species in the Americas went extinct. 

Placenta vs marsupial
A short list of placental mammals and marsupials commonly found in the wild (image source)

The future of Australia’s marsupials

So, what’s next for our pouched friends?

Species around the world are experiencing the brunt of habitat loss and governments are implementing conservation projects to keep them safe. In Australia, the kangaroo is given protected status – with criminals found injuring or killing them, getting a one-way ticket to prison. But not all marsupials have been afforded this luxury, making conservation a challenging endeavour.

Additionally, some species like the antechinus, are going extinct for another (never-anticipated) reason – their suicidal mating tendencies – and have stumped scientists. Experts are now scrambling to save these almost-extinct species, but it may already be too late. 

In terms of whether we’ll see any new marsupial species being discovered anytime soon; only time will tell. For now, the focus is on preserving the population that is present in the Land Down Under.

 

-NISHA PRAKASH 

P.S: Featured image: Pixabay
Image

Deceptive Sizing: 3 Newborn Animals Who Are Ridiculously Smaller Than Their Parents

Ah baby animals…these bundles of joy have been lighting up the wild for millennia. While everyone has been raving about their cuteness, not a lot of people have spoken about their size. Let’s face it, when it comes to size, some animals are impressive…impressively small. 

Here are 3 animals whose babies are way smaller than you thought they would be: 

 

Kangaroos

Kangaroo adults can reach heights of 5.25 feet (1.6 meters) and can weigh 90 kilograms (200lbs). But their newborn joeys are smaller than gummy bears, often smaller than 25 millimeters. 

 

 

Watch the incredible journey this little joey makes to reach the safety of its mother’s pouch:

 

 

Pandas

At their heaviest, adult pandas can weigh 160 kilograms (350 lbs). But their tiny cubs weigh only 1/900th of their mother’s weight! Now that’s really tiny. 

 

Panda 2
A panda mom with her newborn cub

See that little pink floppy thing on the left side? yup, that little nugget is the cub.

Here’s a fun question; what do you call a group of pandas? An embarrassment! Ha ha, all jokes aside, a group of pandas is called “an embarrassment” because of the boisterous way in which panda cubs play when they’re together. It could embarrass any mum. 

Now indulge in some cub time by watching twin panda cubs embark on their first 100 days of life. 

 

 

Elephants

One of the most intelligent animals on the planet, elephants have longest gestation period in the wild. It takes their bodies 22 months to fully develop the calf (imagine being pregnant for almost two years!). But surprisingly, baby elephants when born are only 90 kilograms (200 lbs), while their heavy-weight mothers, aunts and sisters (and not to forget, their brothers and fathers) can reach ridiculously high weights of 3600 kilograms (4 tonnes)! 

 

 

Watch as this newborn calf, just hours old, meets his herd-mates, learns how slopes are not a baby’s friend and discovers the forest he is to grow up in. 

 

 

 

-NISHA PRAKASH 

 

 

 

 

Image

5 Fun Facts About Sheep

  1. Dolly the sheep was the first mammal to be cloned in the world. She was born in 1996 and died in 2003 due to lung disease. Now 8 other species have been cloned after her. 
  2. Like to eat lamb or mutton? If yes to the former, you enjoy dining on young sheep. But if its the latter you like, adult sheep are your preferred meal. 
  3. A sheep’s natural diet constitutes invasive plants .i.e. plants or weeds that are not native to a geographical area and which wreak havoc on the health of native plants and animals (ex: moss, vines etc). That’s why farmers and conservationists use sheep in a process called “conservation farming“, where they consciously rear sheep to eat & clear any invasive plant species in a fragile ecosystem. 
  4. Sheep may appear dull and stupid, but they are quite intelligent and can recognize human voices and faces. They are often observed developing close bonds with specific people or animals on the farm. In fact, many sheep have “best friends” in their own flocks!
  5. Don’t you just love water-proof cosmetics? You need to thank sheep for that. Sheep produce a water-proof fatty oil called “lanolin” to keep their wool dry. It is this oil that is used as a base to produce water-proof make-up. 

 

Bonus

Apart from humans, sheep are the only animals who show a conscious lifelong preference for same-sex mates. A 1994 study showed that 8% of the males in sheep flocks prefer to partner with other males for life, even if there is no dearth of fertile females. In other animal species, a variety of factors from shortage of mates to lack of sexual pleasure can temporarily encourage homosexuality in animal groups.  

 

Sheep 4
Sheep live in tight-knit flocks. Lambs grow up playing with each other. 

 

Sheep 3
Orphan lambs are put with foster moms who have lambs of their own and are producing milk. This can be a very tricky affair for both farmers and lambs. Read all about it here

 

ap_752560517524
Sheep wool never stops growing. Sheep need to be sheared at least once a year to prevent the onset of any dermatological diseases or pest-caused diseases. In 2004, Shrek, a merino sheep from New Zealand hid inside a cave for six years because he was scared of getting sheared. By the time he was coaxed out and caught by farmers, he had enough wool on him to produce 20 full-length men’s suits!

 

Sheep 1
Bighorn Sheep from North America have horns that weigh as high as 14 kilograms. 

 

 

-NISHA PRAKASH 

 

 

Image

5 Fun Facts About African Wild Dogs

  1. Each African wild dog has a unique spotting/marking on its fur. These markings serve the same purpose as human fingerprints and help researchers and gamekeepers keep track of individual pack members.
  2. Unlike in other animal groups where males leave and females stay behind; male wild dogs stay in their birth pack for life, while females leave and join other packs after reaching sexual maturity. This ensures there is no inbreeding.
  3. African wild dogs follow a community-based rearing of their young. Every adult member of the pack is responsible for the safety & upbringing of the pups and both males and females share babysitting duties.
  4. Wild dogs packs are extremely loving and caring, often taking care of the injured members of their packs for years. Healthy, adult dogs give feeding priority to pups and injured pack members, even before feeding themselves.
  5. Wild dogs are extremely intelligent and plan hunts well in advance. In fact, it’s this intelligence, coupled with team work and endurance that makes them successful in 80% of all attempted hunts. In comparison, lions are successful only 17%-19% of the time.

 

Bonus

Humans have tried to domesticate wild dogs like they did other canids, but have remained unsuccessful. Why? Wild dogs have an inherent suspicion towards any animal apart from their own pack-members and they have an intense dislike towards being touched. All domesticated dog species on the other hand, were very friendly and liked being petted, even when wild. 

 

Wild dog 4
Wild dog pups, just weeks old

 

Wild dog 1
Wild dog pack in the midst of a hunt 

 

Wild dog 3
Every adult wild dog in the pack is responsible to teach pups the ways of the wild

 

Wild dog 2
Wild dogs are very curious about their environment

 

 

-NISHA PRAKASH

Image

5 Fun Facts About Indri

  1. Indris are a type of lemur found in Madagascar. They are very rare and an estimated 10,000 are left in the wild, making them critically endangered species.
  2. Indris produce songs to communicate with each other, which comprise of a series of roars and grunts. These songs are so hauntingly beautiful, they’re thought to be as good as the vocalizations humpback whales make as part of their mating ritual.
  3. Indris are a matriarchal society. A female leads the troop for foraging and determines the troop hierarchy.
  4. Indris mate for life and only seek out a new partner when their mates die.
  5. Female indris are fertile only for a single day in the year and they must mate then to ensure pregnancy.

Bonus

Unlike in other lemurs, the indris’ small tail doesn’t serve any purpose and doesn’t help them walk or jump. Instead, indris depend on their muscular legs to jump from tree branch to tree branch. They can jump 10 feet across in a single leap.

Video:

Sir David Attenborough meets an Indri

Indri
An indri 
Indri 4
A baby indri
Indri 3
A mother-baby pair

-NISHA PRAKASH

Image

5 Fun Facts About Puma

  1. Pumas are known by 80 different names around the world. Some of the ones you may have heard of are – Cougar, Panther, Mountain Lion, Catamount & Shadow Cat.
  2. Puma cubs are born with spots on their fur, which they lose as they begin to age.
  3. Big cats roar, while small cats snarl. Unlike lions & tigers, puma can’t roar, but they can snarl. This makes them small cats, despite being the fourth heaviest cat species in the world.
  4. There are only 50,000 breeding Pumas in the wild, making them “Near Threatened” according to the IUCN Endangered Species list.
  5. Puma cubs start hunting small prey at 6 months of age. That’s the fastest of all the cats.

 

Bonus

Pumas are excellent jumpers. They can jump as high as 5.4 meters upwards onto a tree. That’s almost twice as high as the World Record high jump of 2.45 meters by Cuban athlete Javier Sotomayor.

 

2759172 - america cougar mountain lion resting on rock
A puma resting 

 

puma 6
A puma hunting a bear cub. The mother bear runs to save its cub. 

 

Puma 1
A puma cub

 

Puma 3
A puma running

 

Puma 5
A mother-cub pair

 

-NISHA PRAKASH

Image

5 Fun Facts About Wolverines

  1. Wolverines belong to the Mustelidae family, which includes badgers, otters, minks and beavers.
  2. Wolverines secrete a very foul-smelling liquid from their anus to throw-off predators and marauders. This liquid has given them the name “skunk bear”.
  3. Wolverines use a unique tactic to hunt. They climb onto tall trees and pounce onto their prey from the top. Sometimes, the force of the fall is enough to maim or kill the prey.
  4. In a fight between a bear and a wolverine, the bear will more likely be the first to back-off. Why? Wolverines are known for their nasty temper and nastier bite.
  5. The word “wolverine” means “glutton” in Latin. Wolverines will hunt/scavenge anything that comes in their path and pick the bones clean within hours. They’re also great at sneaking food out of traps set by researchers.

 

Bonus

A “wolverine” is actually the male of the species. The female is called an “angeline” and  wolverine cubs are called “kits”.

wolverine 3
An adult wolverine in captivity

 

Wolverine 4
A newborn kit

 

Video: Wolverine kits with their mother

 

So now that you know these amazing facts, which wolverine do you prefer? Comment below. 

wolverine 1

 

-NISHA PRAKASH

Image

5 Fun Facts About Common Buzzards

  1. Common buzzards mean two different things in two different countries. In the UK, they’re raptors and in the US, they’re turkey vultures. In this article, we’re talking about the raptors.
  2. Common buzzard love decorating their nests with fresh greenery and they can be quite picky about the leaves they choose.
  3. Although they can easily hunt large prey like pigeons and rabbits, common buzzards prefer to eat earthworms and dead meat (carrion). That’s quite a small meal for birds their size.
  4. Common buzzards weren’t actually that ‘common’ in the 1950s. Food shortage and wide-spread hunting pushed them to near-extinction. But after the implementation of better agricultural practices and the banning of buzzard hunting, these birds have become the largest population of raptors in the UK.
  5. Buzzards live up to 25 years in the wild.

 

Bonus

Bird trainers and falconers hate using buzzards for sport as they are very lazy birds. Not only are they very slow at learning to fly at baits, but some buzzards refuse to budge from their seats even when commanded.

Buzzard 3
Common Buzzard Eggs

 

Buzzard 4
A Juvenile Common Buzzard

 

Buzzard 2
A White Common Buzzard

 

-NISHA PRAKASH

Image

5 Fun Facts About Armadillos

  1. Armadillos swallow large quantities of air to inflate themselves into a balloon-like shape and float across water bodies.
  2. The three-banded armadillo is the only one of its species that can form into a complete ball. Its shell is so hard that even dogs can’t break it.
  3. When startled, armadillos jump 3-4 feet vertically into the air. This is the biggest cause of fatal accidents between cars and armadillos.
  4. The nine-banded armadillo becomes mother to 4 genetically-identical quadruplets each time it gives birth. Why? It produces a single egg that divides into 4 equal and completely identical parts.
  5. Armadillos are the only animals other than humans which can contract leprosy.

 

Bonus:

Armadillos are a delicacy in the United States. In fact, there’s a special dish called the Hoover Hog which locals in the southern United States make, using roadkill armadillo, fresh veggies and spices.  

However, I strongly discourage you to try this dish, as it is one of the causes of leprosy transmission between armadillos and humans.

Armadillo 2
A three-banded armadillo rolling into a complete ball
Armadillo ancient
Glyptodon; an extinct animal believed to be one of the ancestors of the modern-day armadillo

 

Armadillo 3
A baby armadillo being fed milk

 

BB-ARMADILLO-WEB-002
Three banded armadillo
Armadillo 6
Screaming hairy armadillo
20141122-4671CN
Andean hairy armadillo

 

 

 

-NISHA PRAKASH

Image

5 Fun Facts About Chevrotain aka Mouse Deer

  1. Chevrotain are found only in Asia and Africa.
  2. Chevrotain are super small in size. The various sub-species of the mouse deer range in size between that of a Chihuahua and a Jack Russell Terrier.
  3. Although they resemble deer and have mousey faces, the chevrotain are not related to either of the animals. In fact, they belong to a separate, mostly-extinct species called Tragulidae, of which they are the only surviving members.
  4. They have very long and sharp fangs which they use during battle for territory and mates. Their bites can put even Dracula to shame.
  5. Female chevrotain are pregnant for most of their adult lives. They mate and get pregnant within a few hours of giving birth.

 

Bonus

Chevrotains walk down into the river bottom and remain submerged for up to 4 minutes at a time when they sense the presence of predators.  They may also create secondary burrows for themselves underwater where they stay until the danger passes. To see what this is like, watch the video below.

 

Mouse deer 1
A chevrotain’s fangs are very sharp and long. Males have longer and sharper fangs than females.
Mouse deer 4
Chevrotain mating
Mouse Deer 5
A mother chevrotain feeding a fawn. Mothers stand on three legs, lift a leg in the air and feed their fawns. 
Mouse Deer 6
Fawns are one of the smallest creatures in the wild
male Lesser Mouse-deer
A mouse deer in the Thai forest

 

-NISHA PRAKASH