Luni Tune, who arrived at the zoo 20 years ago, was the last surviving member of a trio Ankoles.

Luni Tune, who was the last Ankole cattle at the zoo, passed away at the age of 23, according to the Houston Zoo.

"If you ever spotted him in his habitat, you knew which one he was—the shy one with the beautifully symmetrical horns. He was part of a trio here for many years, and in the end, he was our last. He ...