Niche:
![Picture](/uploads/1/8/3/5/18354217/188182140.jpg?530)
Shows Niche in finch. Picture from: http://faculty.southwest.tn.edu/rburkett/ES%20%20we25.jpg
According to Dictionary.com a niche is the position or function of an organism in a community of plants and animals. an organism's habitat + role + tolerance limits to all limiting factors. (humidity, soil pH, etc.) All animals have requirements like shelter, food, etc..