Endlings and Bare Branches

An "endling" is the last surviving individual of a species.  I ran across the term at this Kottke post on "George", a tree snail, which somehow triggered my memory of:

A "bare branch" is the Chinese term for an unmarried bachelor (therefore with no children to add to the family tree).

(Just for comparison of Chinese social norms with American, compare the "incel" to the bare branch--focus on sex versus the family.)