I see the point the cartoonist is trying to get across. Look:
ENDANGERED SPECIES
The spotted owl, manatee, and whooping crane are endangered, meaning they are now rare to find, or that there is a very little number of them in this world. And furthermore...
there is only a very little number of people with good manners in today's society.
Now, do you agree that people with good manners are hard to find?
Support your answer with evidence.