An Alien Species is a species of an animal that doesn't belong in the environment or country that it is in, usually it is a foreign animal from another environment and/or country that some how ended up somewhere where it isn't supposed to be.
I hope I answered your question! :)
Alien specie is defined by whether it is a foreighn animal. For instance, in the UK some of the spiders around are alien specie, because they are not from this country.
A animal or species without a backbone
A xenocide is the killing of an entire foreign (plant or animal) species, or, in science fiction, the genocide of an entire alien species.
Animal species have no defination but a biological description .
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 feral animal is a domesticated animal species that has reverted back to the wild. A feral cat is a wild animal.
An alien is actually someone that is a resident of another country and goes to another country. Like a tourist is alien to the place he is visiting. Or someone who is excluded from a group is considered an alien to that groupYes but all these people are the same species an alien species is another species apart from Homo sapiens eg some species from another planet or galaxy.Or maybe in this question an alien species is a species that is not native to the US.
Alien X is not exactly the most power full alien, it belongs to an alien species called SABIONS in this species there are aliens more powerfull than Alien X.
I believe it is a transliteration of ζῷον, meaning 'living being' or 'animal'. It is thus the root of 'zoology' and all related terms.
No. No alien species are known to exist at this time.
The presence of an alien species may lead to inter-specific competition. An alien species may reproduce quickly due to a lack of predators of the species's ability to utilize resources that native species cannot. The alien species may even introduce diseases. Predation by the alien species can lead to a loss of biodiversity and some native endangered species may be driven to extinction.
Probably not on Earth or near it (at least as we would recognize them) but chances are there are thousands of alien species on distant worlds in the universe. They could be as un-advanced as microbes, of as advanced as Star Trek, ether way, other beings exist elsewhere.