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Blue Polyrhachis cyaniventris ant:
Wrestling harvestmen:
Crab spider on Hoya flowers:
Hairy grasshopper:
Ant with Cordyceps fungus:
Cordyceps is an interesting entomopathogenic fungus (a fancy way of saying a fungus that parasitizes and kills insects/spiders). Each Cordyceps is species specific and is something pretty horrifying. The spores will land on an insect and gradually the fungal mycelia will grow down past the insects exoskeleton and into the body where they will spread like tree roots, invading and replacing host tissue. This kills the insect in a very slow, lengthy process. In the final stages, the fungus takes the neurological reins and modifies the insect’s behaviour so as best to befit itself. In ants it will cause them to climb to a high perch and bite down on a leaf or stem with a death grip. The ant will slowly die, perhaps from starvation, perhaps from the deterioration of its body, but after some time there might be seen movement. To be sure it is extremely slow and small but it is there. If sped up, it would look like a worm wriggling out of the body. And this isn’t far from the truth. It is the fruiting body of the cordyceps fungus. Which grows a stalk several inches long, terminating in asci or sacs containing the spores that will lead to a new round of infectious dissemination. Why go to all this trouble to cause the ant to climb to a high perch? Well, the jungle is very humid with rain falling often and in large quantities. Ants being principally ground dwellers, it wouldn’t do to have the ants and fungus along with them washed away, covered in mud or stuck together. Additionally, just like climbing to the top of a mountain will afford a better view of the surroundings, so too will climbing to the top of a plant or bush in a jungle microenvironment. From here, the fungus is free to be blown in all directions by the slightest current of wind, the spores, like insidious grains of pollen, waiting to be planted in the fertile backs of their hosts.
Thanks for looking and commenting,
Paul
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