Camouflaged retreat

white silk covering hollow in treetrunk
Jumping spider retreat, standard model

Three years ago I wrote about the clever hideaways constructed by jumping spiders on the trunk of our poplar gum. They are still building them but there’s always something new … one of our current residents has chosen to make its retreat in a broad groove which features orange-brown bark instead of the silver-grey of the larger open expanse of the trunk.

But spider silk is silver-white, so the standard retreat would shine out to predators like a beacon – not a good idea at all. What to do? Colour the silk, of course, to match its surroundings!

I have no idea how it managed to do this – whether it changed its silk during production or scurried round on its new white retreat sticking crumbs of bark to it. Both seem unlikely and if it’s the latter, the crumbs are too tiny to see even under the highest magnification of my macro lens.

brown silk retreat
Jumping spider retreat, tinted model

To see the spider itself – the Flat White Jumping Spider, Arasia mollicoma – follow this link to my earlier post.

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