1. Size: Male black rhinos are generally larger than females. On average, males stand between 1.4 and 1.8 meters (4.5 and 6 feet) tall at the shoulder and weigh between 1,000 and 1,400 kilograms (2,200 and 3,100 pounds). Females, on the other hand, stand between 1.1 and 1.4 meters (3.5 and 4.5 feet) tall and weigh between 700 and 1,000 kilograms (1,500 and 2,200 pounds).
2. Horns: Both male and female black rhinos have two horns on their noses, but the horns of males are typically larger and more robust. Male horns can reach lengths of up to 50 centimeters (20 inches), while female horns are generally shorter and thinner.
3. Facial Features: Male black rhinos tend to have a more pronounced forehead and a more concave facial profile compared to females. Additionally, the bony ridge between the eyes, known as the nasal boss, is usually more developed in males.
4. Neck: Males typically have a thicker and more muscular neck compared to females.
5. Body Structure: Males have a more compact and robust body build compared to females, with broader shoulders and a deeper chest.
6. Behavior: While both males and females are solitary animals, males are known to be more territorial and aggressive, particularly during mating season.
It's important to note that these physical differences can vary among individual rhinos, and there is some overlap in characteristics between males and females. These differences are generally observed on average and may not be applicable to every single individual.