Here's why:
* Mammals are warm-blooded: Howler monkeys are mammals, and all mammals are warm-blooded. This means they maintain a consistent internal body temperature, regardless of the external environment.
* Internal temperature regulation: They achieve this through internal processes like metabolism and sweating. This allows them to stay active and function efficiently even in different climates.
* Cold-blooded animals: Cold-blooded animals, like reptiles, rely on external sources of heat to regulate their body temperature, making them less active in cold environments.
So, black howler monkeys, being mammals, are definitely warm-blooded.