For example, you might be thinking of:
* Proboscis monkeys: These are found in southeastern Borneo, primarily in mangrove forests and swamps.
* Snub-nosed monkeys: These are found in southwestern China and Vietnam, typically in high-altitude forests.
* Red-shanked douc langur: These have long snouts and live in southeastern Asia, primarily in forests near rivers.
If you can give me more details about the specific long-nosed monkey you're interested in, I can give you a more accurate answer.