Threatened Chameleons of Madagascar
D I S A P P E A R I N G D I V E R S I T Y
Bertrand lifts up the tiny chameleon on the tip of
his finger, and we stare at this little marvel in
wonder. Early this morning we clambered up
over the limestone cliffs behind the beach where
we had camped to look for chameleons in the dry
forest that covers this tiny island off Madagascar’s
north coast. Bertrand Razafimahatratra is my
guide and an unparalleled chameleon expert.
He knew exactly where to find these tiny leaf
chameleons, carefully searching them out in the
leaf litter between the buttress roots of a huge
tree about a half-hour hike from the beach. As he
stands with one chameleon perched on his finger,
he points out another in the dead leaves. I crouch
down and gently scoop this microscopic animal
onto my palm. I am holding the world’s smallest
reptile—Brookesia micra—in my hand. Incredible!
We are on an uninhabited islet just off the
coast of Madagascar: a fragment of untouched
dry forest in the middle of a clear, turquoise sea.
We arrived yesterday in a little motorboat,
skimming over gentle waves to land on a perfect
half moon of sand where we set up camp while
we search for chameleons. Maybe 500 individuals
of B. micra live only here on this island—a tiny
population of tiny reptiles. Over the last two
months, Bertrand and I have driven the length of
Madagascar (over 6,000 kilometers, or 3,700 miles)
in search of chameleons and we have photographed
over 40 of Madagascar’s 76 species. Just like
B. micra, almost all chameleon species we have seen
are restricted to small patches of habitat, perfectly
adapted to their respective environments—from
wet rain forests to seasonal dry forests, or
highlands to deserts. Take the Labord’s chameleon
(Furcifer labordi ), for example, adapted to live in
the seasonally dry forests of Madagascar’s east
coast. This species spends almost its whole life as
an egg. The eggs hatch with the first rains and
grow to adulthood, reproduce, and die in the four
to six month wet season, leaving the eggs to
endure the months of drought. Chameleons are
the masters of their chosen habitats.
Almost alien in appearance, chameleons
have independently moving eyes, they can change
the color of their skin on demand, their tails
curl into a perfect spiral, and they have odd
appendages—an extended knobby nose or a horn
protruding from their forehead, and a fantastic
extendable tongue for catching insects.
Madagascar is the center of chameleon
biodiversity; almost half of the world’s chameleon
species live here and all are endemic—they live
nowhere else on earth. This pattern is seen across
all groups of organisms here. Madagascar has
more endemic species than almost anywhere
else in the world. Alone in the Indian Ocean,
Madagascar’s wildlife has evolved in isolation for
over 80 million years, generating thousands
of species seen nowhere outside this island.
However, as we traveled through Madagascar, we
witnessed a landscape worn thin from overuse:
deforestation, agriculture, and wildfires have
reduced original forest cover to less than 8 percent.
Many of the chameleons we have seen live in
tiny fragments of habitat. How can these
habitat specialists survive without their habitat?
Today, over half of Madagascar’s chameleons
are threatened with extinction, and there is a
real urgency to act to conserve Madagascar’s
remaining natural habitats and their unique
species. The dry forest that is home to the tiny
B. micra is a reminder of what Madagascar may
have looked like a century ago, and, unlike many
chameleon species, the world’s smallest reptile
is safe in its perfect patch of habitat far from
human disturbance.