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i am doing a biology project and i need to know this

In your text it should say. But a niche is the the function and organism has in it’s area.
An example is a giraffe’s niche is feeding on the canopy on trees. Just look at the animal and figure out what it mainly does in its environment.
This site should help you.
http://animals.about.com/od/naturalhistory/f/whatisaniche.htm