When do black rhinos reproduce?

Black rhinos reach sexual maturity around 3-4 years of age for females and 5-7 years of age for males. However, they typically don't start breeding until they are 6-7 years old for females and 8-10 years old for males.

Here are some additional details:

* Gestation period: Black rhinos have a gestation period of 15-16 months, the longest of any land mammal.

* Calving interval: Females typically give birth to one calf every 2-3 years.

* Breeding season: Black rhinos can breed year-round, but there is a peak during the rainy season.

* Social behavior: Black rhinos are solitary animals, except for mothers with their calves. They communicate through a variety of vocalizations and scent marking.

It's important to remember that the reproductive success of black rhinos is threatened by poaching and habitat loss. Conservation efforts are critical to ensure the survival of this endangered species.