
Funny, the things that you see in nature, like this humanoid face on the cephalothorax of a golden orb-weaver, Nephila pilipes.
I have previously described aspects of this spectacular species of spider, here and here. With this instalment, the adult female in the image below descended from her web on the 19th April to build her egg-sac on the ceramic-tiled floor of our living room.

At the outset, her abdomen was rotund, perhaps twice the diameter of the largest aspect within the image captured at the conclusion of the construction.
On a foundation bed of the same orange silk that can be seen, a white disk was established and then encased in more of the orange material. Five weeks later, the orange casing had lifted. The white disc had been abandoned, but its character was surprisingly hard; rather like coral in its chalky-porousness. I can only imagine that it was produced in much the same way as a mantid’s ootheca – soft upon release but hardened under external exposure.
It had been my understanding that egg-laying was the final phase in the three-month life-cycle of this species, but this individual struggled back to the ceiling and over a succession of days manged to rebuild a small web. Aided by the sympathies of my children, a number of march flies allowed for a fuller recovery and the re-establishment of a master-web. She lived another month and then presumably underwent a second and final reproductive cycle.


Jennifer Marohasy BSc PhD has worked in industry and government. She is currently researching a novel technique for long-range weather forecasting funded by the B. Macfie Family Foundation.