1. The water they live in, is usually polluted by contaminated run-offs, mostly from factories. The organism in the water cannot grow anymore and as a result, flamingos have nothing to eat. Since the Chilean Flamingo is in a narrow niche, it cannot find an alternative diet.
2. The Chilean Flamingos stay around alkaline waters, and many animals don't, so construction is a big factor on impacting the Chilean Flamingo we may think if the waters get drained it will not affect too many organisms, but it does affect the Flamingos. We may also think that if the Chilean Flamingos go extinct, it won't effect the food chain, but it does. What happens when there is an outburst of algae in the water? All the surrounding micro organisms will die and the fish that eat those micro organisms will too. Now what do the crocodiles, lizards, and turtles eat? There is a chain reaction.
http://www.tournorfolk.co.uk/amazona/AmazonaFlamingoT.jpg
