The introduction of exotic species is a major problem that can lead to the endangerment of native plants and animals. This happens when, intentionally or unintentionally, foreigners bring a species to a new environment where the species is unknown. When these species are introduced, they sometimes prey on native species, causing them to become endangered or even extinct. Luckily, airports, for example, are becoming stricter. They won't let passengers bring fruits and vegetables from a foreign country, because they might be carrying exotic species. These interlopers are a major contributor to endangerment.

• They eat the food of others, which doesn't leave enough for the native species.
• These new animals also occupy safe habitats and the native animals that once lived there are forced to leave.
• They act as food for native species but since they lack important nutrients, the consumption of them leads to the death of the offspring of the native species.
• They also, sadly, consume the eggs, children, and adults of animals native to the land.

the european starling - an unwelcome guest
This species was introduced by a man named Eugene Scheiffer, someone who was intrigued by the works of Shakespeare. He wanted to bring all the birds Shakespeare mentioned in his plays into the United States . So Scheiffer intentionally released eighty starlings in New York City in 1890, then another forty in 1891. He had also introduced the starling into Ohio , but it failed to survive. The bird is native to Eurasia, but has now been brought into South Africa , Australia , North America, and New Zealand . The starling is probably one of the most familiar birds in the temperate regions. They are about 19-22 cm long and are a shiny black color splattered with white. The European Starling is a very noisy bird that even sounds the famous "wolf whistle." Starlings sometimes drive off native birds such as Bluebirds, Tree Swallows, and the Purple Martin. They are multiplying faster and faster. It is actually legal to kill these birds in the U.S. at any time because they pose such a big threat to songbirds. In some places, predators like the Peregrine Falcon have been introduced to prey on starlings and help reduce their population.