It’s very rare for gorillas to have twins – in fact, they only account for 1% of all mountain gorilla births.
In the 1970s, there were only around 250 mountain gorillas left in the wild, and they were classed as critically endangered, which means they were at risk of not existing on our planet at all.
But their numbers have been steadily increasing thanks to efforts to help them, and in 2018 they were downgraded to just ‘endangered’, with over 1000 of the primates known to scientists.