Jane Goodall Institute

The Jane Goodall Institute advances the power of individuals to take informed and compassionate action to improve the environment for all living things.
Aug 18, 2011

Food for Thought

Frodo eating Lamb
Frodo eating Lamb's Tail - 1

Bill Wallauer, JGI wildlife cameraman and research videographer, discusses lamb’s tail, one of his favorite plants found in Gombe National Park.

Favorite Chimp Food
Latin Name:  Antidesma venosum
Local Name:  Mnziganziga
Common Name:  Lamb’s Tail, Tassleberry

Lamb’s tail (a name used by Dr. Jane Goodall for its long dangling clusters of berries) is a chimp and Bill favorite.  Referred to as tassleberry across Africa, lamb’s tail grows in mixed woodland scrub and wooded grasslands on the drier low ridges at Gombe National Park in Tanzania. 

Lamb’s tail is part of a large genus (Antidesma venosum) of 170 species that can be found in Old World tropical forests and woodlands (Africa, Southeast Asia, Australia and the Pacific Islands).  It is an important food source for birds and mammals, including people.  Antidesma venosum grows throughout equatorial Africa and along the east coast of the continent all the way to South Africa.  It is not only an important plant for wildlife, it has many useful traits for people as well.  The fruit is more than edible and plant parts are used as building material, medicine to relieve pain and stomach ailments, fuel, and even fish poison.  This is just another reason to protect and restore the native plants of Africa. 

Lamb’s tail grows as a woody shrub, eventually reaching the size of a small 10- to 12-foot tree.  The flowers grow in catkins, which are long-hanging clusters of flowers.  Its leaves are evergreen.  The leaves are about six inches long, simple and oval, and pointed at the tips.  Like the blueberry family, male and female flowers grow on separate trees.

April is the peak season for lamb’s tail.  In a good year, the fruit hangs off the vine. It is one of the most important chimp foods of the season.  The long clusters of berries are three to 4.5 inches long and half an inch wide.  When I eat lamb’s tail, I grab a whole bunch, hold it up high, and strip the berries into my mouth.

The fruit of lamb’s tail is delicious.  It has a tart, raspberry or blackberry flavor, and is eaten by Gombe’s chimps and baboons.  The fruit hangs down in long clusters of blueberry-sized berries.  When unripe, the berries are white and when they ripen, they turn a deep purple.  Though I never took the time, I have always longed to make mnziganziga jam (lamb’s tail jam).  I have no doubt that it would rival the best blackberry or raspberry jam.

Chimps can spend hours on the grassy woodland ridges of Gombe eating lamb’s tail.  I love this season in Gombe because it gets you out of the valley thickets and up onto the open areas, which offer beautiful views of the forest and lake.  When I shot the images of Frodo below, he spent more than two hours perched on one small mnziganziga tree.  That says a lot about the productivity of this plant.  Frodo is a huge eater (a glutton really) and he is the biggest chimp in Gombe’s history.  The way chimps use their dexterous lips to pick off the ripe berries is impressive.  They can pick through the whole bunch, leaving the white, unripe berries untouched.  When a baboon approached Frodo’s tree, he was quick to threaten the baboon away.  In a tree this size, chimps are not very tolerant of food competition.

In Gombe, the lamb’s tail crop will last through the end of April and into the first weeks of May.  I have been working in Uganda for the past few springs and have missed the April lamb’s tail season.  Maybe next year I will be there to make the jam that I have always wanted to try!

Frodo eating Lamb
Frodo eating Lamb's Tail - 2
Frodo eating Lamb
Frodo eating Lamb's Tail - 3
Aug 16, 2011

Summer 2011 Update

New arrival gets cleaned up
New arrival gets cleaned up

Here are a few pictures of recent events at Tchimpounga.

First, one of our new arrivals gets washed down. When chimps first come to Tchimpounga, many of them are malnourished and have infections. Getting them hydrated and clean is the first step to their second chance.

Second is Makasi and Lobo. Their story was featured in last winter's update. As you can see, they are still the best of friends.

Lastly, is a photo of our youngest resident at Tchimpounga. Though the females at Tchimpounga are on a form of birth control, one of them surprised the staff by giving birth to this little guy sometime ago. Now you can see this little fellow catching a ride on his mom's back everywhere.

Makasi and Lobo
Makasi and Lobo
Newborn Catching a Ride on Mom
Newborn Catching a Ride on Mom's Back
Jun 2, 2011

On the Trail of Gombe’s Twin Sisters

In a recent blog update, Dr. Deus Mjungu, Gombe Stream Research Center’s director of chimpanzee research, wrote of observing the interaction between Gombe National Park’s twin sisters, Golden and Glitter. Dr. Mjungu also hinted about some potentially exciting news—fingers crossed!

It is the end of an unusual rainy season. Chimps are scattered all over their range because food is not in abundant supply. For the past two hours, we have been following the twins, Golden and Glitter. During this time, Glitter has been busy checking each termite mound she encounters. In contrast, her sister, Golden, has spent much of her time feeding on scattered fruits and leaves.

Now, the two have arrived at another termite mound. Glitter has cut a piece of twig vine, removed some leaves and is staring at Golden. Golden, on the other hand, seems to want to continue to travel. After about two minutes of indecision, both agree to termite fish. Termite fishing, however, does not seem to be rewarding and every now and then Golden switches from termiting to feeding on fruits or leaves.

Glitter persists with termiting. After about two hours, Golden’s patience for waiting on her sister diminishes. She moves very close to her sister and shows some signs of wanting to leave. Glitter does not pay attention. However, after she sees her sister move far away, Glitter stops termiting and slowly follows her.

Recently, Glitter has been seen looking particularly tired and resting frequently. Her belly seems to be a little bit distended. Is she pregnant? Keep tuned!!!

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