Posts Tagged ‘Natural Encounters’

Animals You May Have Missed: Acouchi

Posted by Leigh in Animal Information,Fun on grounds

The Houston Zoo is home to a lot of animals, and some of them are often overlooked.  This series of blog entries is focused on the animals that you may have missed on your last visit.

When people approach the indoor rainforest exhibit in Natural Encounters, the first things that draw their attention are the vines and branches at eye level and above.  Often, this is also the area of highest activity – several small primate species, birds, and even a sloth can be seen in these branches.  But if you take the time to look down instead of up, you may catch an intriguing resident of this exhibit: the acouchi.

Acouchi in Natural Encounters

Acouchi in Natural Encounters

Acouchis are rodents from South America.  They are found primarily on the forest floor, as their feet are not suited for climbing.  These little animals are important to the health of the rainforest – they eat fruit, and will even break into a run when they hear fruit hit the ground.  When fruit is abundant, they bury it underground like their cousin, the squirrel.  And just like a squirrel, an acouchi does not find all of the fruit it buried.  This works to plant seeds and spread them around the forest, helping the next generation of rainforest giants to grow.

Our acouchi is usually in the right half of the exhibit.  If you can’t find him on the ground, check the rockwork in the back.  The exhibit is designed to allow ground-dwelling animals to move up and down.  As a prey animal, the acouchi likes to be somewhat hidden, so you may find him hiding under the bridge or near the potted plants.

Of course, no animal is guaranteed to be visible on every visit.  Even if you know where to look, you might still miss the animal if it is off exhibit or hiding especially well when you visit.  Unlike his arboreal roommates, the acouchi does not alternate between exhibits; he is always in the indoor rainforest.

Animals You May Have Missed: Honey Pot Ants

Posted by Leigh in Animal Information,Fun on grounds

The Houston Zoo is home to a lot of animals, and some of them are often overlooked.  This series of blog entries is focused on the animals that you may have missed on your last visit.

Between the mole rats and the reef tank in Natural Encounters lives a colony of a very unique type of ant.  All ants have different levels of workers, but the honey pot ants have one special group that gives them their common name.  These workers, called repletes, are little living storage chambers for their colony.

Honey pot ant repletes in Natural Encounters

Honey pot ant repletes in Natural Encounters

In North America, our honey pot ants are in the genus Myrmecocystus.  They are only found in the desert southwest, and the ants we have on exhibit are part of this group.  There are other groups of ants native to the arid parts of Australia and Africa that have a similar adaptation.  One important problem of living in an arid region is food; during wet or rainy periods there is more than any animal can eat, but during dry times food is scarce.  Many animals store food during the wet periods, to have it available for the dry times.  Honey pot ants do the same, only they store the spare food inside living members of the colony.

Workers will feed protein, nectar, and other foods to the repletes, whose bodies distend to look like fluid-filled globes.  The repletes generally hang from the ceiling of the colony, simply waiting and being fed.  When their habitat goes dry and food is limited, the repletes will regurgitate the food they are storing and give it back to the workers who fed them, who in turn share it with the entire colony.

Because most of what the repletes store is sweet, many native peoples consider them a delicacy, and eat them as treat when they can find the colonies.  You can’t eat them, but to see our honey pot ant colony at the Houston Zoo all you need to do is follow the mole rat exhibit around the corner.   The last few chambers next to the “front porch” are the home of our honey pot ants.

Of course, no animal is guaranteed to be visible on every visit.  Even if you know where to look, you might still miss the animal if it is off exhibit.    The honey pot ants are typically easy to see, and their underground colony is lit so you can even see the repletes, full of food, hanging from the ceiling.  Check them out on your next visit to the Houston Zoo!