Here are 10 animals that have some of the highest levels of testosterone and the impact it has on their behavior and characteristics.

Mabu saunters across a grassy field and raises his long, gray trunk to wrangle food from a hole carved inside a large boulder, captivating the attention of a girl propped up on her father’s shoulders.

• During courtship, a male and a female elephant will rub their bodies on each other and even wrap trunks. The females tend to run away from the males and he will have to pursue her. This game of cat ...