John Frederick Eisenberg (1935–2003)[1] was an American zoologist.
He left the zoo in 1982, when he was the zoo's assistant director, to take a position teaching at the University of Florida University of Florida.
In 2000, he retired and moved back to Washington state.
Even during his retirement, he maintained his passion for mice and other rodents, and even went to Sri Lanka to study mammals of various sizes, including elephants.
He died on July 6, 2003, at the age of 68 at his home in Bellingham, Washington.