Under AZA's direction, the Species Survival Plan program began in
1981 to maintain a healthy and self-sustaining population that is
genetically diverse and demographically stable. Selection is both
practical and political. So-called flagship species like giant
pandas, Siberian tigers and lowland gorillas arouse strong public
feelings, while lesser known creatures are protected for their
importance to ecosystems.
Master plans for each species outline the goals for the population
and design a family tree. Sometimes the best course is to stagger
breeding or have no breeding at all so the animals won't outgrow
holding spaces.
Studbooks contain vital records of an entire captive population of
species: births, deaths, transfers and lineage. Computer analysis
allows for sound breeding recommendations. Bellinger is the
regional studbook keeper for the king vulture even though the zoo
doesn't host the species. Occasionally, keepers swap notes at
studbook conventions.
Husbandry manuals set guidelines based on the best scientific
knowledge for diet and care. Since most zoo animals are born in
captivity, it makes it easier when they are traded from one
institution to another. Recently, two Eureka-born spider monkeys
were sent to the John Ball Zoo in Grand Rapids, Mich., to join a
new breeding colony.
The Sequoia Park Zoo joined a project to evaluate the population
genetic structures of golden lion tamarins, an endangered species
that survives only in a small area of Brazil northeast of Rio de
Janeiro. Genetic data derived from hair samples taken from the
little monkeys that sport lion-like manes will help determine
future management plans for the species.
The project is critical. The tamarins number barely a thousand and
about half are in captivity.
Monkeys are much smaller than apes and are more widely distributed
throughout the world. They have prehensile tails and are
considered, by human standards, less intelligent than apes. What
would become apparent later is that chimps are actually 98.4
percent genetically human.
Anthropologists estimate that humans separated from the Pan
paniscus line four million years ago. That line later split into
chimps and bonobos. Besides DNA, there are striking physical
similarities as far as hands, feet, and the nervous and immune
systems are concerned. Behaviorally, there are yet more
connections.
Goodall and other primatologists have dedicated their lives to
studying Bill's relatives and their research has illustrated the
intricacies of the large ape's brain. Chimps communicate in a
variety of ways from grunting to gesturing.
In
Visions of Caliban, Goodall wrote: "There is one very common communicative signal
used by chimpanzees everywhere — a soft, coughlike sound usually
accompanied by a sudden raising of the arm. This arm wave looks
like a similar gesture made by humans and, for humans and
chimpanzees alike, it seems to convey much the same message:
'Leave me in peace.'"
A famous chimp named Washoe learned sign language and could
associate the signs with eating and drinking. But evidence is
lacking to show that chimps can combine symbols to create new
meanings or use syntax. Goodall’s research, however, has shown
that chimps can deliberately plan.
When the late Figan, an alpha male chimpanzee, was young he led
the other chimps away from their camp then returned alone to help
himself to the bananas.
Chimps are also well-known for using tools, such as using sticks
to fish termites from their mounds or turning leaves into sponges.
Creationists have long disputed evolution. Realizing the different
views, Bellinger says the zoo tries to allow people to appreciate
various animal habitat rather than turning it into a religious or
scientific debate.
Bill’s quarters were designed to stimulate. He has a fake termite
hill with buried treats, a color TV in his backroom tuned to PBS,
and then, of course, there's his art.
As part of an enrichment philosophy, Bellinger wondered what Bill
would do with watercolors. At first, they thought he might paint
his walls, but the chimp quickly learned to operate within the
boundaries of the paper after he was shown what the brush would
do.
"He didn't have any formal schooling in art," Bellinger jokes.
With his semi-opposable thumbs, the 85-pound Bill, small for his
age, was always left alone to create and was never video taped. He
selected the colors and went about his work until, at some point,
he simply stopped.
The piece was done.
For several years, he had an artistic neighbor, a chimp named
Ziggy who died in 1996. His passing received national attention.
Ziggy spent his childhood performing in nightclubs until his owner
lost control of him as he matured. In 1963, the city rescued Ziggy
from an animal shelter.
The two chimps' styles differed quite dramatically. Ziggy was
heavy with the colors while Bill's pieces were much more subtle.
The paintings were sold at a fundraising art show in Eureka City
Hall in 1995.
Life is good for Bill as he receives some of the best medical care
available. A birthday party was held in his honor when he turned
50, a milestone for a species that typically survives half as long
in the wild. The chimp even received congressional recognition at
the well-attended "dress casual" event.
Bill, who now has the full run of the cage after a fence was
removed following Ziggy's death, has quit painting. Bellinger said
they occasionally offer him watercolors, but he seems to have
moved on to other things in life.
He can go into his backroom whenever he wants, but he chooses to
stay out in the open with people.
The world has changed ever since Bill came to Eureka. With the
closeness in genetics, Bill's treatment in the circus could now,
perhaps, be viewed as discrimination. Out of respect, Bellinger
doesn’t want to release much about the chimp’s early years until
after Bill's death.
While many small zoos are extinct like the animals they were
trying to protect, the Sequoia Park Zoo is still holding on to a
small corner of the animal kingdom.
That's due, in part, to a few good ambassadors.
Postscript: Bill died in 2007 at the age of 62 after battling a
long illness.