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Signature Spider

Argiope luzona

Photo by John B.
Published on Project Noah
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Field Notes

Description:

Argiope luzona (Walckenaer,1841). This spotting is an update on - https://www.projectnoah.org/spottings/158993300... in which I explained that when an Argiope luzona spider's neat and tidy web (and web decoration) degenerates into a rather shambolic state, this is usually an indication that the spider is going to moult or will be producing an egg sac fairly soon. I went out at around 7:00 a.m. today to see if either of these events had taken place. I checked the spider, before taking any pictures and I could see that it had not moulted because the small mark (I think it is a scar from an injury), on the middle yellow band on its abdomen, is still there. If it had moulted, since my previous photo yesterday, that mark would be gone. So, I looked around for the other possibility (an egg sac) and there it was, just about 12 inches above and to the left of the spider, a new egg sac that was not there yesterday. I attempted a photo (the last one shown above) which included both the spider and its egg sac, I had the wrong lens on my camera for a wide shot. So, please excuse the very poor photo which I included just to try an show what I could see, but the quality is so poor that I will take a better shot tomorrow and replace the bad picture. Postscript: I have now replaced the last photo with a slightly better one, taken on Dec 9. So, you will see (just about) that the spider has changed its web decoration, but the main purpose is to try and show the relative positions of the spider and the egg sac.

Habitat:

This Signature Spider was spotted in our backyard vegetable plot. Its web was, on one side. moored on a Hyacinth Bean (Lablab purpureus), locally known as Bataw. The other side of its web was moored on a fence. Plant I.D. - http://www.stuartxchange.org/Bataw.html

Notes:

The pictures above show that this spider did not only produce an egg sac during the night of Dec 7th. to Dec 8th., but it has produced a perfect new web with a Four-armed Discontinuous Cruciate Stabilimentum. What an amazing and resilient spider this Argiope luzona is.

Species ID Suggestions

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