Even as the conservancy posted the pictures, Kenyans had already begun posting the caption of the picture.
"Anyone have a toothpick?" @kaaaa_chonjo said.
@just_wesh said "What did the Rhino say to the Carrot? ... Lettuce be friends!"
@sudantherhino said "I love to see Sudan making funny faces with his lips. Can you put up another funny picture?"
"I know us rhinos can't see very well, but this carrots with every meal is not working!" @Nemsy1 said.
@VaghelaLynn said "Where's the ketchup??"
Wildlife direct which is a charitable organisation funded by conservationists also posted on their social media about the memorial of the rhino.
"Today, March 19, remains etched in our minds and hearts as the day we lost the last known male northern white rhino," they noted.
"Sudan's passing is a harsh reality of the rate with which we are losing critically endangered species."
Sudan died in Kenya at the age of 45, after becoming a symbol of efforts to save his subspecies from extinction, a fate that only science can now prevent.
At his death, there are only two females remaining alive and the hope that in-vitro fertilisation techniques will advance enough to preserve the sub-species.
Sudan, elderly by rhino standards, had been ailing for some time, suffering from age-related infections, according to his keepers at the Ol Pejeta Conservancy.
The other male rhino, Suni, died of natural causes in October 2014.
