Organisms that can maintain their own internal body temperature without help from an outside source are called endotherms.

Here are some examples of endotherms:

* Mammals: Humans, dogs, cats, whales, etc.

* Birds: Eagles, penguins, sparrows, etc.

Endotherms are able to regulate their body temperature through internal mechanisms such as:

* Metabolism: They generate heat through metabolic processes.

* Insulation: They have fur, feathers, or blubber to help trap heat.

* Sweating or panting: They can cool themselves down by evaporating water.

* Shivering: They can generate heat by rapidly contracting muscles.

Let me know if you'd like to know more about endotherms!