Love That Dare Not Squeak Its Name
By DINITIA SMITH
oy and Silo, two chinstrap penguins at the Central Park Zoo in
Manhattan, are completely devoted to each other. For nearly six
years now, they have been inseparable. They exhibit what in penguin
parlance is called "ecstatic behavior": that is, they
entwine their necks, they vocalize to each other, they have sex.
Silo and Roy are, to anthropomorphize a bit, gay penguins. When
offered female companionship, they have adamantly refused it.
And the females aren't interested in them, either.
At one time, the two seemed so desperate to incubate an egg together
that they put a rock in their nest and sat on it, keeping it warm
in the folds of their abdomens, said their chief keeper, Rob Gramzay.
Finally, he gave them a fertile egg that needed care to hatch.
Things went perfectly. Roy and Silo sat on it for the typical
34 days until a chick, Tango, was born. For the next two and a
half months they raised Tango, keeping her warm and feeding her
food from their beaks until she could go out into the world on
her own. Mr. Gramzay is full of praise for them.
"They did a great job," he said. He was standing inside
the glassed-in penguin exhibit, where Roy and Silo had just finished
lunch. Penguins usually like a swim after they eat, and Silo was
in the water. Roy had finished his dip and was up on the beach.
Roy and Silo are hardly unusual. Milou and Squawk, two young
males, are also beginning to exhibit courtship behavior, hanging
out with each other, billing and bowing. Before them, the Central
Park Zoo had Georgey and Mickey, two female Gentoo penguins who
tried to incubate eggs together. And Wendell and Cass, a devoted
male African penguin pair, live at the New York Aquarium in Coney
Island. Indeed, scientists have found homosexual behavior throughout
the animal world.
This growing body of science has been increasingly drawn into
charged debates about homosexuality in American society, on subjects
from gay marriage to sodomy laws, despite reluctance from experts
in the field to extrapolate from animals to humans. Gay groups
argue that if homosexual behavior occurs in animals, it is natural,
and therefore the rights of homosexuals should be protected. On
the other hand, some conservative religious groups have condemned
the same practices in the past, calling them "animalistic."
But if homosexuality occurs among animals, does that necessarily
mean that it is natural for humans, too? And that raises a familiar
question: if homosexuality is not a choice, but a result of natural
forces that cannot be controlled, can it be immoral?
The open discussion of homosexual behavior in animals is relatively
new. "There has been a certain cultural shyness about admitting
it," said Frans de Waal, whose 1997 book, "Bonobo: The
Forgotten Ape" (University of California Press), unleashed
a torrent of discussion about animal sexuality. Bonobos, apes
closely related to humans, are wildly energetic sexually. Studies
show that whether observed in the wild or in captivity, nearly
all are bisexual, and nearly half their sexual interactions are
with the same sex. Female bonobos have been observed to engage
in homosexual activity almost hourly.
Before his own book, "American scientists who investigated
bonobos never discussed sex at all," said Mr. de Waal, director
of the Living Links Center of the Yerkes Primate Center at Emory
University in Atlanta. "Or they sometimes would show two
females having sex together, and would say, `The females are very
Then in 1999, Bruce Bagemihl published "Biological Exuberance:
Animal Homosexuality and Natural Diversity" (St. Martin's
Press), one of the first books of its kind to provide an overview
of scholarly studies of same-sex behavior in animals. Mr. Bagemihl
said homosexual behavior had been documented in some 450 species.
(Homosexuality, he says, refers to any of these behaviors between
members of the same sex: long-term bonding, sexual contact, courtship
displays or the rearing of young.) Last summer the book was cited
by the American Psychiatric Association and other groups in a
"friend of the court" brief submitted to the Supreme
Court in Lawrence v. Texas, a case challenging a Texas anti-sodomy
law. The court struck down the law.
"Sexual Exuberance" was also cited in 2000 by gay rights
groups opposed to Ballot Measure 9, a proposed Oregon statute
prohibiting teaching about homosexuality or bisexuality in public
schools. The measure lost.
In his book Mr. Bagemihl describes homosexual activity in a broad
spectrum of animals. He asserts that while same-sex behavior is
sometimes found in captivity, it is actually seen more frequently
in studies of animals in the wild.
Among birds, for instance, studies show that 10 to 15 percent
of female western gulls in some populations in the wild are homosexual.
Females perform courtship rituals, like tossing their heads at
each other or offering small gifts of food to each other, and
they establish nests together. Occasionally they mate with males
and produce fertile eggs but then return to their original same-sex
partners. Their bonds, too, may persist for years.
Among mammals, male and female bottlenose dolphins frequently
engage in homosexual activity, both in captivity and in the wild.
Homosexuality is particularly common among young male dolphin
calves. One male may protect another that is resting or healing
from wounds inflicted by a predator. When one partner dies, the
other may search for a new male mate. Researchers have noted that
in some cases same-sex behavior is more common for dolphins in
Male and female rhesus macaques, a type of monkey, also exhibit
homosexuality in captivity and in the wild. Males are affectionate
to each other, touching, holding and embracing. Females smack
their lips at each other and play games like hide-and-seek, peek-a-boo
and follow the leader. And both sexes mount members of their own
Paul L. Vasey, a professor of psychology and neuroscience at
the University of Lethbridge in Canada, who studies homosexual
behavior in Japanese macaques, is editing a new book on homosexual
behavior in animals, to be published by Cambridge University Press.
This kind of behavior among animals has been observed by scientists
as far back as the 1700's, but Mr. Vasey said one reason there
had been few books on the topic was that "people don't want
to do the research because they don't want to have suspicions
raised about their sexuality."
Some scientists say homosexual behavior in animals is not necessarily
about sex. Marlene Zuk, a professor of biology at the University
of California at Riverside and author of "Sexual Selections:
What We Can and Can't Learn About Sex From Animals" (University
of California Press, 2002), notes that scientists have speculated
that homosexuality may have an evolutionary purpose, ensuring
the survival of the species. By not producing their own offspring,
homosexuals may help support or nurture their relatives' young.
"That is a contribution to the gene pool," she said.
For Janet Mann, a professor of biology and psychology at Georgetown
University, who has studied same-sex behavior in dolphin calves,
their homosexuality "is about bond formation," she said,
"not about being sexual for life."
She said that studies showed that adult male dolphins formed
long-term alliances, sometimes in large groups. As adults, they
cooperate to entice a single female and keep other males from
her. Sometimes they share the female, or they may cooperate to
help one male. "Male-male cooperation is extremely important,"
Ms. Mann said. The homosexual behavior of the young calves "could
be practicing" for that later, crucial adult period, she
But, scientists say, just because homosexuality is observed in
animals doesn't mean that it is only genetically based. "Homosexuality
is extraordinarily complex and variable," Mr. Bagemihl said.
"We look at animals as pure biology and pure genetics, and
they are not." He noted that "the occurrence of same-sex
behavior in animals provides support for the nurture side as well."
He cited as an example the ruff, a type of Arctic sandpiper. There
are four different classes of male ruffs, each differing from
the others genetically. The two that differ most from each other
are most similar in their homosexual behaviors.
Ms. Zuk said, "You have inclinations that are more or less
supported by our genes and in some environmental circumstances
get expressed." She used the analogy of right- or left-handedness,
thought to be genetically based. "But you can teach naturally
left-handed children to use their right hand," she pointed
Still, scientists warn about drawing conclusions about humans.
"For some people, what animals do is a yardstick of what
is and isn't natural," Mr. Vasey said. "They make a
leap from saying if it's natural, it's morally and ethically desirable."
But he added: "Infanticide is widespread in the animal kingdom.
To jump from that to say it is desirable makes no sense. We shouldn't
be using animals to craft moral and social policies for the kinds
of human societies we want to live in. Animals don't take care
of the elderly. I don't particularly think that should be a platform
for closing down nursing homes."
Mr. Bagemihl is also wary of extrapolating. "In Nazi Germany,
one very common interpretation of homosexuality was that it was
animalistic behavior, subhuman," he said.
What the animal studies do show, Ms. Zuk observed, is that "sexuality
is a lot broader term than people want to think."
"You have this idea that the animal kingdom is strict, old-fashioned
Roman Catholic," she said, "that they have sex just
In bonobos, she noted, "you see expressions of sex outside
the period when females are fertile. Suddenly you are beginning
to see that sex is not necessarily about reproduction."
"Sexual expression means more than making babies,"
Ms. Zuk said. "Why are we surprised? People are animals."
from New York Times
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