Skip to main content

04.10.2020 Animal of The Week: Orca

Hello everyone.

This week's animal of the week is Orca. They are also known as killer whales.

Habitat

Orcas live all over the world. They migrate according to where their prey are. However they are more common in colder waters.

Diet

Orcas are at the top of the food chain and have very diverse diets, eating mainly fish but also penguins, and marine mammals such as seals, and even other whales. They hunt (and live) in groups, making them very dangerous to certain species.

Dangers

There are a few dangers that they face, although for now the population doesn't seem to be suffereing. Some of these are:

-Hunting for entertainment as they are intelligent creatures and so appeal to people who want to test their skills.

-Polluted waters can be a threat as when certain chemicals get into the orca, most likely from their prey, they can be lethal. These can get into the water by oil leaks and chemical leeches.

-Prey as overfishing can cause prey to become scarce

-Fisherman see them as a threat as they can intercept the catch and while some will shoo them away or lure them away by gentle methods, others will shoot them.

-Lastly a threat it shares with nearly all the creatures in the world: climate change. The rising sea levels and changing temperatures can affect their prey as they move to other areas.

Are Orcas dangerous for humans

There have been no fatal attacks on humans in the wild. Four people have been killed by captive orcas. However it is thought that captive orcas suffer due to being confined and can therefore become aggressive.


Thank you so much for reading this post. Please remember to pass the blog address onto anyone who may be interested and to subscribe by email. Thank you!


Images:

Comments

Popular posts from this blog

10 Animals on the edge of extinction, You did not know about no.1 - Yangtze Finless Porpoise

The first animal of this series is the Yangtze finless porpoise, a dolphin living in fresh water in southern China in the Yangtze river. It is one of the very few dolphins living in fresh water and the only species left in the Yangtze river. Unfortunately, the porpoise is facing extinction. What is it? The Yangtze finless porpoise is a dolphin species living in the Yangtze River in southern China. It is one of the very few dolphin species that live in freshwater, and the only one that survived in the Yangtze river after the Baiji Dolphin was declared functionally extinct in 2006. It characteristically is about 2 meters long, has no fins -as the name suggests- and no beak. Its mouth however is curved upwards like a smile, giving the Porpoise and cute and friendly face. It feeds on small fish, crustaceans and molluscs. Sadly, the Yangtze finless Porpoise is considered "critically endangered" as there are only about 1000 of them left.  Why i...

Why Didn't People Act Sooner On The Climate Crisis?

Hi Everyone! Welcome back to Green World, where today I wanted to talk about why people didn't act sooner about the climate crisis , when we have known about this issue for decades. I asked myself this too, and it wasn't until I read the chapter about it in Greta Thunberg's book that I started to understand the reasons behind why action was not taken sooner, and why this crisis has been allowed to escalate as far as it has. As someone who has only been on the planet for 14 years, a part of me does resent people around long before I was for not having acted on an issue that they knew would continue to affect people around the world. They knew it was not an issue that would go away, so why didn't they act, when it was easier to do so? Changing our now very ingrained habits is so difficult, whereas fifty years ago, ways of life could have been more easily influenced. Well, there are a few reasons why action was not taken to combat cl...

Beavers and their dams: what effects do they have?

Hi everyone, Today we're talking about beavers and their effects on the surrounding ecosystems and environments. 'Beaver' referres to two species in the genus Castor . They are found in North America, Europe and Asia and are the largest rodents in those places and the second largest rodents in the world. Beavers grow up to 80 cm long with a flat, paddle-shaped tail up to 45 cm. They have a small head, large incisor teeth and fur lined lips to avoid inhaling water while cutting and transporting branches underwater. They weigh 16-30kg and are nocturnal. Beavers live in streams, rivers, marshes, ponds and lakes where they construct dams. These have earned them the title 'ecosystem engineers' but we'll talk about that later. The dams are constructed with branches, sticks and rocks. They create a calm pool with a higher water level on one side. Beavers make their homes (lodges) in these calm pools. Beaver dams are both have bot...

Animals 21-25 in our '50 incredible animals' series

Hi Everyone! Here are the next five animals in our current series! We hope you learn something from this. 21. Stick insect Stick insects are masters of disguise. They look like twigs or leaves. This strange appearance makes them hard to spot when stationary. Stick insects are herbivores, feeding on leaves, and can live for up to three years. Their habitat includes most tropical and subtropical regions, but there are a few species that live in temperate areas as well. There are roughly 3 000 different stick insect species! Not much more is known about them, because they are difficult to find. The two main threats to their populations are the pet trade and people killing them so as to frame their carcasses, like butterflies. Their conservation status  ranges from critically endangered to least concern  - so basically every category that is on the list! 22. Glass frog The glass frog is, well, see through. You can literally ...

Deforestation and why it’s a problem

Hi everyone, Welcome back to another post. Today we’ll be talking about deforestation and its impacts on our earth. Deforestation, the widespread clearance of natural forests, has been happening for thousands of years. One example is Western Europe, where, two millennia ago, 80% of the land was cloaked in dense forest cover. However, over time, a significant portion of this green expanse was sacrificed to create room for crops, livestock grazing, and as a source of fuel and building materials. Presently, a mere 34% of Western Europe retains its woodland. Today, the tropics deal with the brunt of deforestation. Activities such as mining, agriculture, road construction, and the establishment of vast cattle ranches drive the mass clearance of tropical rainforests. This results in the release of huge amounts of carbon dioxide into the atmosphere, exacerbating the global climate crisis. The consequences come in two waves: first, the reduced number of...

08.11.2020 Animal of the week: Dolphins

Hello, This week we are going to talk about dolphins. Habitat Dolphins live in all of the oceans in the world. They also live in big rivers such as the Amazon in Brazil. Different species live in different parts of the world. Some species prefer coastal waters while others spend days at a time out on the high seas. Are dolphins fish or mammals? Although dolphins live in water they are not fish. Here are only two of the main reasons why dolphins aren't fish. Dolphins have lungs, whereas fish have gills. Because dolphins have lungs, they have to come up to the surface every few minutes. Fish are cold-blooded. Dolphins are warm-blooded. Dolphins are related to whales, who are also mammals. Different types There are almost 40 types of dolphin that live in the ocean and 6 types of river dolphins that live in rivers. The biggest type of dolphin is the orca or the killer whale . The smallest type of dolphin is the hector's dolphin. ...

Eco System, Galapagos: Part 2 Evolution

Hello and welcome to our second post in the Galapagos Series. Today we are going to talk about the iconic evolution in the Islands. The evolution on Galapagos is incredible. It was these islands that gave Charles Darwin the idea of Evolution by Natural Selection. He landed on the Galapagos island on September 16th 1835. The Galapagos Islands are home to hundreds of different types of animal. Creatures like the Galapagos penguin swam to the islands. Giant Tortoises and Marine Iguanas were carried to the islands by ocean currents. They can survive for months without food or water. Birds carried seeds to the islands when they stopped for a break. Insects like spiders got blown off branches and landed on the islands. The arrival of pollinators was crucial for plant life and therefore also the entire ecosystem. Carpenter Bees make nests in tree trunks. It is thought that some carpenter bees' nests were carried across the ocean as d...

Evolution

Hi, So today, I am going to talk about evolution. We have mentioned this before in our Galapagos Ecosystem series but we’ve never gone over exactly what it is. So before Charles Darwin thought of his theory of evolution, the majority of people in Europe thought that all species were unrelated and that humans were not related to animals. This was mostly based on Christianity. Darwin studied hundreds of different species and on the Galápagos Islands , he first started to form his theory of evolution. Darwin's theory of evolution by natural selection, as it was later called, is best explained by the example of the giraffe. Let's assume that giraffes have short necks (as they did many centuries ago). Now a mother has two children. By chance, one has a slightly longer neck. This is a coincidence. As the giraffes feed on the lower leaves of the trees, these slower disappear. There aren't enough leaves for the giraffes. Thus the giraffe wi...

Amazon Rainforest series - part 2: eco system and food chains

Welcome back to our Amazon mini-series! Today, we're going to talk about the eco system and food chains of the Amazon Rainforest. The eco system is very complex. If you read our last Amazon post you will know the great number of species that call the Amazon Rainforest home. The Amazon Rainforest is a very accurate name for it. Massive amounts of rain fall on the forest every year. Most of that rain is blown in from the Atlantic Ocean. The rest comes from evaporation. The rainforest is known to be full of life. It provides one of the last refuges for jaguars , harpy eagles and pink river dolphins . But the rainforest is home to many more animals than that. Everyone has heard of poison dart frogs right? In fact, the Amazon Rainforest contains 1 in 10 of all known animal species on Earth! That's a lot of animals! The Amazon is home to over 1 000 species of birds, from hummingbirds to eagles. Macaws are probably the most well...

Metamorphosis

Hello! Today we thought it would be good to explain exactly how metamorphosis works. It's a term that we often use when talking about frogs, butterflies or other animals, but we've never actually explained what it is or how it works. What is metamorphosis? Metamorphosis is the term used to describe the changes that some animals undergo when turning into adults. It is a physical change that happens after birth/hatching. There is a brilliant quote from the website a-z animals that I just couldn't put any better:  unlike the typical subtle developments in animals, metamorphosis is dramatic. It’s controlled by a release of hormones in the cells. Mammals usually move from adolescence to adulthood and old age gradually, maintaining their form and shape. However, in metamorphosis, an animal moves through those stages and changes from one form or shape to another. How does metamorphosis work? Let's take the classic butterfly example./d...