Mountain gorillas are endangered - there are an estimated 1,063 in the wild according to the latest census results (which come out every 5-10 years).
Mountain gorillas live in east-central Africa in two isolated groups – one in the Virunga Volcanoes and one in Bwindi Impenetrable National Park, Uganda.
This means that exposure to human illnesses – even a cold - can have potentially detrimental impacts on gorillas as they are so genetically similar to us, but they haven't developed the necessary immunities.
An average silverback gorilla can weigh up to 180kg (that’s almost 30 stone), and measure 170cm (over 5’5”) tall on all fours. In contrast, female mountain gorillas weigh 90kg, and measure up to 150cm (4’9”).
Mountain gorillas spend about a quarter of their day eating, mainly plants. Around 85% of their diet is made up of leaves, shoots and stems, but gorillas can also eat larvae, snails, ants, and even roots, barks and rotting wood (a good source of sodium/salt).
At night, mountain gorilla groups sleep together in nests on the ground, or in trees, that they make from foliage. Infants will share their mother’s nests, staying safe and warm.
This includes short barks when they’re mildly alarmed or curious. To intimidate rivals, male gorillas strut with stiff legs, beat their chests, and use vocalisations like roars or hoots.
Most mountain gorillas live in stable family groups of around 10 individuals, with one dominant male and several females. Both males and females in the group care for their infants; hugging, carrying and playing with them.
Gorillas are classed as infants until they reach around three-and-a-half years old, and adults from around 8 years. Males between 8-12 years are called 'blackbacks'. Then from 12 years old, they develop a silver section of hair over their back and hips, earning them the name 'silverback'.