Skip to main content

10 Animals on the Edge of Extinction No. 10- The Javan Rhino

The Javan rhino is listed as the 1st animal on WWF’s list of the 10 world’s most endangered animals, and I for my part, had never heard of it! If you hadn’t either, we’re changing that now. 



A bit about the rhino’s lifestyle


The Javan rhinos are now exclusively found on the island of Java in Indonesia, but were once found in vast regions of northeast india and Southeast Asia. They have a dark grey colour which looks almost black when wet, and their (often pink) skin folds look a bit like plated armor. Both males and females have lower incisors which resemble tusks that they use to fight. Males have one relatively short horn of about 25 cm (10 inches). 

Javan Rhinos live in tropical forests, marshy areas and in the thick bush. They are mainly browsers and eat over 100 plants species they find in the forest, weigh between 900 and 2300 kg (1984-5071 pounds) and are between 3 and 3.2 meters (10- 10.5 feet) long. 




How endangered are we talking? 


Javan rhinos are the most endangered animal species of the world, and thus the most endangered of the 5 rhino species too. Their habitat has been reduced to only the Ujung Kulon National Park where only an estimated 70-75 rhinos live. They have extreme problems to combat and can only survive with human protection and aid. 



Why are they endangered? 


The population left in the national park is being intensely monitored and studied and we know that the Javan rhino is suffering under

  1. The low genetic diversity: Due to the very small population left, the genetic diversity leaves much to be desired. And the less genetic diversity there is, the more difficult is it for the species to adapt and survive, as anyone who listened in bio class knows. 
  2. Natural Disasters: The Javan Rhino’s last remaining habitat is located in an area extremely prone to tsunamis and near a volcano. On top of that comes climate change and rising sea levels which also threaten the park. 
  3. Invasive Species: The Arenga Palm has overtaken parts of the park, reduced habitat quality and the plants that naturally occur there by spreading extremely quickly and blocking the light, making it hard for the plants the Javan Rhinos eat, to grow. There is also the Javan Banteng, an invasive species whose diet overlaps with that of the Javan rhino. This doesn’t necessarily seem problematic at first, but considering that the Javan Rhino needs about 50 kg of food daily, no competition is welcome. 
  4. Illegal trade and poaching: One of the main reasons Javan rhinos are so endangered are naturally humans, the excessive demand for rhino horns and its use in traditional Chinese medicine for example are widely known to be a problem for all rhinos. 
  5. Reduced habitat: As these rhinos thrive in the tropical rainforest, they have naturally been a victim of deforestation and human invasion of the natural world, and continue to be closed in upon by people. 
  6. Disease: Javan rhinos seem to catch a lethal disease from water buffalos and in recent years, 4-5 have been found dead, with their horns still intact. 



What’s being done? 

 

There are different approaches planned and various efforts already running to help the Javan rhino survive: 

  • The Arenga palm is being cut down and moved from the rhino’s habitat 
  • WWF is planning to establish a second population in a different location 
  • The Javan rhinos are constantly being surveyed and protected to best efforts in the national park  



This was just a quick introduction, people often have little time, so I try to keep this short so that they feel they have the time to read about nature and animals. But as I was collecting my information from these websites, I really enjoyed looking into the rhino-problem itself, but also these organisations. So if you’re further interested in this, I would check out the websites I used as my sources! 

On top of that is this the 10th Endangered Animal post, and the series is therefore finished! I’m really excited to have started and ended this series, although E. B-P did most of the work in between. Nonetheless I hope you enjoyed this series and can now brag with your knowledge about random animals. 


Have a great day guys!


Your Green World Team💚




Sources: 

https://www.britannica.com/animal/Javan-rhinoceros

https://www.worldwildlife.org/species/javan-rhino

https://www.wwf.org.uk/learn/wildlife/endangered-animals

https://www.ifaw.org/animals/javan-rhinos

https://www.savetherhino.org/rhino-info/rhino-species/javan-rhino/


Image:

DSC0001/JAVA Map”, owned by dany13 (on flickr.com), is licensed under CC BY 2.0.

Comments

Popular posts from this blog

30.08.2020 Animal of the week: Whale Shark

Hi! It is International Whale Shark Day today, so we thought, we would do this week's animal of the week about whale sharks. Are whale sharks, sharks or whales? Whale sharks are not whales and they aren't a mix of whale and shark. They are sharks. So, why are they called whale sharks if they aren't whales? Well, they are very big. Whale sharks normally grow to a length of 5.5-10 metres. However, the largest whale shark to be accurately measured was 18.8 metres long! That is about as long as a lorry or as high as a short oak tree. Basically, whale sharks are massive. Habitat and Diet Whale sharks prefer warmer waters. They live in all tropical seas. Every spring, they are known to migrate to the continental shelf of the central west coast of Australia. The whale shark is one of the three known filter-feeding shark species in the world. Like whales, they eat plankton.  Images: Image 1:  This image is o...

Animals 11-15 in our '50 incredible animals' series

Hello, We have another five amazing animals for you today. Enjoy! 11. Dhole This is a dog species which looks rather like a red fox . They are difficult to put into any of the dog subfamilies. They aren't foxes, nor wolves, nor domestic dogs. Dholes are fast runners and live in packs of 5-12 individuals. Although sometimes, different packs will join forces to become a pack of 30 or more individuals! However, these super packs are broken up after a successful hunt. The different packs rarely attack each other as neighbouring packs are often closely related. Dhole packs live in burrows with multiple entrances. They can be found in eastern and southern Asia. They eat wild berries, insects and lizards and as a pack hunt deer, rodents and other wild mammals. Interestingly, unlike other dogs, they rarely kill by biting at the throat. They are also good swimmers! 12. Irrawaddy dolphin The Irrawaddy dolphin can be found in coastal areas of south a...

How much do you know about trees? - Quiz

Hello, This month's quiz is all about trees. Questions: What is the name of the network that trees use to communicate? a) the mycorrhizal network b) the mythcorhinia network c) the symbocommunial network How much of the amazon rainforest has been lost due to deforestation in the last 50 years? a) 12% b) 17% c) 23% True or False? Over 75% of land-based species are found in forests? How much carbon do tropical forest contain? a) 230 gigatons b) 280 gigatons c) 330 gigatons In California, there is a rather strange tree that has survived 13 000 years by cloning itself. What species? a) Pin oak ;b) English oak c) Palmer's oak True or False? The oldest surviving tree species, Gingko trees, have been around since just after the meteor that killed off the dinosaurs struck. Where do acacia trees grow? a) cold and ha...

Eco System, Galapagos: part 3 Discovery and modern life

Hello Everyone, This post in our mini series is all about the discovery of the Galapagos. The islands are renowned for their evolution and extraordinary animals but how did we discover it and who? The first recorded visit to the Galapagos was completely by chance in 1535, when Fray Tomas De Berlanger found this undiscovered land during a voyage to Peru. There may have been others who saw the islands but he was the first to step foot on them. De Berlanga was Spanish and returned to the Spanish Empire, describing the islands and the animals that inhabited them. The group of islands was named "Insulae de los Galopegos" (Islands of the Tortoises) in an atlas published in 1570. The first full map of the islands was made in 1684 by Ambrose Cowley, who named the individual islands after some of his fellow pirates or after British royalty and high class citizens such as Lords. These names were used in the navigation charts of the islands that wer...

Animals 46-50 in our '50 incredible animals' series

Hi everyone! Welcome to the final part in our '50 Incredible Animal series' where you can find out about animals 46-50. We started this series almost a year ago to celebrate our 50th post and it feels crazy to think that we are now nearing our 100th. To read all of the previous posts from this series, click here . Hope you enjoy it! 46. Spiny bush viper Spiny bush vipers, Atheris hispida, are a species of venomous snake native to Central and East Africa in tropical forests and shrubland. They are mostly solitary creatures but can climb trees, which is where they find the majority of their prey. Spiny bush vipers are carnivorous and feed on mammals, frogs and lizards, as well as birds. Independent from birth, Spiny bush vipers can have up to 12 'snakelets' at a time and are 15cm in length. Currently, there are no known threats to Spiny bush vipers, and they are categorized as Not Evaluated on the IUCN Red List. 47. Leafy sea dragon ...

How well do you know intelligent animals? - Quiz

Hi everyone It's time for another quiz. Intelligence is necessarily restricted to humans. Many animals display signs of what we deem to be intelligence.  Questions How many words have some crows been taught to say out loud? a) 20 b) 50 c) 100 Which signs of intelligence have been found in orangutans? a) tool use b) logical reasoning c) recognising themselves in a mirror True or False? An African gray parrot called Alex was trained to correctly categorise items into 13 colour categories. What do some particulary clever veined octopuses use coconut shells for? a) to play with b) shelter c) food True or False? Orcas can recognise themselves in a mirror. What have chimpanzees recently been observed treating their wounds with? a) insects b) tree sap c) fresh water How many nouns did an American border collie recognise and remember? a) over 500 b) o...

How well do you know the ocean floor? - Quiz

Hi Everyone and welcome back to Green World! Today we have another quiz to test your knowledge about the natural world. This is, of course, part of our monthly series of quizzes, so please give us some feedback on how you are finding it so far in the comments! This time, it's all about the ocean floor. Questions How much percent of the earth's surface consists of ocean floor? a)50% b) 60% c) 70% True or False? Just like on dry land, the ocean floor has mountains, plains and valleys. Which ocean can the Mariana Trench be found? a) Pacific Ocean b) Altantic Ocean c) Indian Ocean True or False? The Mariana Trench is 11km deep. How much of the earth's surface is covered by abyssal plains? a) about 33% b) about 50% c) about 10% True or False? Studies estimated that 90% of deep sea species haven't been discovered yet? Tr...

29.11.2020 Animal Of The Week: Jaguar

Hello, Today (29th November) is world Jaguar day so this week our animal is the Jaguar. The Jaguar is an animal I know pretty much nothing about so I am going to learn a lot too! Jaguars (panthera onca) live for 12 - 15 years. Their heads and bodies are 150-180cm long and their tails are 70-90cm long! They weigh 45 - 110 kg. Habitat Jaguars live primarily in the Amazon Basin, though they can be found in smaller numbers in Central America. They once lived everywhere from central Argentina up to the southwestern United States but since the 1880s they have lost over half of their territory. They are mainly found in tropical rainforests but can live in savannas and grasslands. Diet They eat fish and turtles as they are actually quite competent swimmers as well as deer, iguanas, birds and monkeys; they will eat almost anything! Are they endangered? Jaguars are classed as near endangered and face several threats. South and Central Americ...

Killing invasive species: necessary?

Hi everyone, Today's topic is a rather controversial one: is killing invasive species necessary? We'll take it apart for you to come up with your own opinion. Enjoy! Definition Firstly, let's clarify what an invasive species is. An invasive species is a species that is not native and most likely causes harm to the ecosystem where it now lives. This does not include animals that migrate to another area. Why is it a problem? Depending on the species and the ecosystem, invasive species can cause a lot of harm to their surroundings. Often invasive species have no predators in their new habitat and reproduce in such large numbers that they massively overpopulate, causing death for other species. Or they bring sicknesses the local animals are not accustomed to, and that kills them. For example black and brown rats are an invasive species on the Galapagos Islands : Black and brown rats were introduced to the Galapagos Islands in the 17th ce...

How well do you know the Arctic and the Antarctic? - Quiz

Welcome back to Green World, As announced last week, we're starting our new monthly series: quizzes! This post contains the questions, you have to write down the answers and compare them with the solutions right at the bottom of this post.  Questions: True or False? The Arctic is not actually a land mass, it's a frozen ocean. How many people live in the Arctic circle? a) 500 000 b) 4 million c) 10 million True or False? Narwals don't actually have unicorn-like horns. That's just a legend. What percentage of the world's freshwater is frozen within the Arctic's ice? a) 10% b) 15% c) 20% True or False? The Arctic covers parts of 15 different countries. Scientists exploring Antarctica have measured winds of up to... a) 100 km/h b) 150km/h c) 200km/h True or False? The driest (natural) place on Earth is in Antarctica...