The selfie shots of two posing gorilla posted on twitter on the 19th of April 2019 has taken off like a stampede.
The two shots showing the gorrilas posing with anti-poaching rangers, have descended into memes as the tweet has been retweeted 65.2k and 275k likes.
The image was taken at a gorilla orphanage in Virunga National Park, DR Congo, where the animals were raised after poachers killed their parents.
The tweet was shared by a twitter user based in the United Kingdom.
Two Gorillas pose with the anti-poaching rangers who guard them pic.twitter.com/Gvt3acyB0J
— 🤴🏼💅🏼 (@Spilling_The_T) April 19, 2019
Also, another twitter account with the name Joshua Oliveros, explains the actions of the gorillas. 
To clarify, apes, specifically gorillas and chimpanzees, normally move through a type of quadrupedal locomotion (knuckle-walking) but sometimes engage in bipedalism (standing using their legs).
— Niño (@_JoshuaOliveros) April 20, 2019
A March 19, 2019 National Geography article titled “Why this gorrila prefer to walks upright” gives an insight into reason why gorrilas practise bipedal.
Read more on knuckle walking and bipedal gorrilas