@DavidBrown I don't know what it says but the Zoo's site has some info on it:
'Loxodonta Africana
This bronze elephant bust was commissioned for the commemoration of the Zoo’s 60 year anniversary and the donation of the land for the Zoo by the Hogle Family. It was created by sculptor, John B. Mortensen and was dedicated on July 31, 1991. This sculpture is located on a cement column just past Twiga Terrace.'