Richard Leakey on rights

From ANIMAL PEOPLE, January/February 1999:

Explained recently reinstated Kenya
Wildlife Services director and world-reknowned
field biologist Richard Leakey recently to the Dali
Tambo’s People of the South broadcast audience,
“We now know that elephants communicate, have a
sense of humor, have a sense of grief, and have a
sense of family. They recognize family over several
generations.”
Allowing listeners to contemplate what all
that means for a moment, Leakey then declared, “I
think humans today owe animals a certain courtesy
and respect, and I believe the intelligent mammals,
in particular, need a bill of rights––not human
rights––but a bill of rights.”