For example , bald eagles , ospreys , and peregrine falcons were facing extinction because their food sources ( fish and other birds ) were contaminated with toxins .
Animals can go to the brink of extinction because of the food chain that exists through the different communities .
Bald eagles , ospreys , and peregrine falcons were facing extinction because their food sources ( fish and other birds ) were contaminated with toxins .
Animals can go to the brink of extinction because of the food chain that exists through the different communities .