Exotic Species.
An alien species is a species that is not native to an area. An exotic species is native to an area but not common.
A native species originated from that area while an exotic species came from somewhere else.
An exotic species is a plant or animal species that is not native to a specific region but has been introduced there, often by human activity. These species can disrupt local ecosystems, outcompete native species, and cause harm to biodiversity.
they are alike
a house sparrow is an exotic bird no a native bird!
Often the exotic species has fewer natural enemies in the new environment but competes for the same food supply and other necessities as the native species it displaces. Sometimes the exotic species is more adaptable or more aggressive and so pushes out a native species. Sometimes the exotic species reproduces at a higher rate or more successfully than does the native species.
When exotic species are introduced into an area these species can grow at exponential rate due to a lack of competitors and a lack of predators they may take over niches of native species and can eventually replace the native species completely
No. Australia has very strict laws about the introduction of exotic species which could cause damage to the environment and prey on native fauna. Too much damage has already been done by species that were introduced in the colonial years.
Exotic species are simply those that do not belong in your particular habitat. They are harmful because when they are introduced into your habitat they compete with some native species and threaten to make it extinct. Such is happening with the European starling and many native North America birds.
: 'Exotic' by definition implies non-native status. Therefore, an exotic pest would be one that migrates or is imported to a new location in which there are no natural predators or other controls on its proliferation. : The result of the introduction of a species into an ecosystem that evolved without them, exotic pests have no natural predators in their new environments. Native species may not have the defenses necessary to ward off a novel predator, and introduced species can out-compete native species and drive them to extinction or change an ecosystem by altering relationships within it. : Gypsy moths (imported into the US in an effort to produce domestic silk), the Mediterranean fruit fly (imported on foreign produce), and the zebra mussel (transported to the Great Lakes on the hull of a European tanker) are all examples of exotic pests capable of causing significant disruption in their adopted environments.
a species that has been introduced from another geographic region to an area outside its natural range