Tag Archives: polyrachis

Ant nanny!

Dear All – Thanks for the kind comments and sparing a moment to consider the world of insects.

 

Here is a another snippet from the rainforest. Climbed a hill on Christmas day so that I could telephone friends and family and wish them well. On the way down I noticed large black ants clambering about the stems of some grasses. As I brushed past them, they did not scurry away as most ants do.

 

I peered closer to one of them to see what they were up to. I flicked the grass with my fingers, and still the ant stood her ground. Then I noticed that she was standing guard over a small ‘herd’ of scale insects.

 

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In a set-up similar to humans herding cattle and other livestock, many different kinds of ants lovingly tend scale insects, aphids and other plant-feeding bugs. In return the ants get to milk their charges for honeydew. The bugs get a veritable army of protectors, and in some cases even get carried around by their ant nannies!

 

Ant in the evening…

Ant in the evening…

 

A few weeks ago while visiting a forest at the coast I took a stroll in the evening. One of the most common kinds of ants along the East African coast are members of the genus Polyrachis. These are fairly large (as ants go!), over 1 cm long, and can commonly be found clambering around houses and trees.

 

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This particular ant was wandering up a twig of a tangled shrub at the edge of the path. It walked up and down the stem several times before climbing onto a leaf. These ants are famous for tending other insects – primarily bugs of various kinds that suck plant juices and reward the ants with treats of honeydew. I found this bug lying against the stem where the ant was walking up and down.

 

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After a few minutes, the ant clambered on to a leaf in the sunshine. There it sat sunning itself for a few minutes before wandering off.

 

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I wonder what it was thinking of – perhaps ‘How do I get home to my colony?’, Or was it, just like I was, enjoying the evening sunshine streaming through the forest… It seems that even ants need a moment to themselves sometimes.