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Introduced and Invasive species

Due to either a species being introduction or being invasive, wildlife have a tendency to turn up where you do not expect them

Yellow tailed Scorpions are found in England but most people are not aware of this as even though they have been in England for over 150 years, originating in the Mediterranean they have not moved on from the docks where they were brought to by ships.

These scorpions are found in the walls of buildings and the walls around the docks in Plymouth, they live in cracks o the walls and feed on terrestrial and flying insects, they have created there own small ecosystem where they are the top predators.

Raccoon dogs are found in countries such as China, Korea and Japan but they have been spreading through Asia and have also been seen in most European countries including Norway, some also escaped from fur farms. Raccoon dogs resemble Raccoons but are closer related to foxes, they are omnivorous and generalist so they can easily adapt to different diets.

Brazilian wandering spider are regarded to be the most venomous spiders in the world, a school in Scotland ordered bananas from Brazil to learn about the country in school.

Once they opened the container they found a live wandering spider in it, the school contacted a local zoo who came and collected it, it is now in a breeding program. Containers are sprayed by insecticide so the wandering spider some how survived this process possibly by shutting down its body and going into a hibernation like state but this did not just happen once there has been a few cases similar to this recorded.

Eagle owls have been seen in Scotland and other parts of the UK but most people are not to sure how many there are there could be 20 to 60 breeding pairs. Eagle owls were native to Scotland in the past so the ecosystem should not be effected greatly by this animal has the native wildlife evolved along side the Eagle owl. The government is keeping an eye on them but is not planning to intervene unless they have to but that should be unlikely as I said the ecosystem is used to having Eagle owls.

The white tailed eagle was reintroduced back into Scotland in 1975 on the Island of Rum have have started to recolonise the Scottish mainland. These Eagles have a varied diet are are opportunistic there main diet is fish which is why they are also called fish eagles, they also eat reptiles, smaller birds, rabbits, hares and other small mammals.

As they sometimes feed on the same prey as golden eagles and overlap territories they sometimes come into close proximity this on the most part plays out with these large birds watching each other from a distance and then going their own way. If the White tailed eagle becomes aggressive as they can be aggressive birds compared to the Golden eagle which is more placid the Golden eagle will move away unless its protecting its nest, when they do fight even though the White tailed eagle is larger and more aggressive the Golden eagle comes out on top most of the time due to them being more agile and having more powerful legs they also tend to be more determined when fighting other large birds.

One species people may or may not be aware of being an invasive species is the dingo in Australia, they were brought to Australia by seafarers from Asia about 4,000 years ago and have caused a lot of problems on the continent. They out competed the native large predators such as the Tasmanian tiger or Thylacine and became the top predator which is not a surprise as Marsupials evolved along side Placental mammals such as dogs and cats and where normally out competed and this is why they are now only found in Australia and the Opossums in the Americas.

Dingo's have been used in a lot of arguments about when does an invasive species become native as most people would say the Dingo is native to Australia and they do fill an important role in the Australian ecosystem.

Thanks for reading .

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