Photo Adventures with Curiosity and Learning


October 21, 2007: Adventures with Miagrammopes

Today I decided to have an experiment with Miagrammopes. I was curious about her response to having one end of her trap line cut. Here she is in her linear configuration - a tight trap line

oct 21 7574 high wire act leaf

Here to the left, you can see a small tangle of cribellate silk, a multi nonaligned group of filaments that apparently faciliates capture of an insect that collides with the strand

oct 21 7578 high wire act

Here she is aligned with the trapline attachment to the leaf. I then detached the other end (maybe 0.5 M long)

oct 21 7597 original trap line

She is now in her retrieval posture. You can see slack silk between the tip of her front legs and behind the metatarsel joint

oct 21 7612 first trap line

Here you can see a tightly wound ball of silk between her palps (you can also see two of her 8 eyes behind the palps

oct 21 7624 tight tangle ball

Now that she has recovered the slack silk, she will probably eat it and recycle the protein. Here she is climbing onto the leaf and will look for the attachement point of another trap line

oct 21 7634 recovery

For whatever reason, here she is back just hanging in the breeze. Perhaps thinking about how to get out of this mess that I made, or perhaps fascinated by the flash of my camera

oct 21 7649 after break

After some time, she mounts the other trap line and her is increasing the tension. Her curved posture is a sign that the trap line is loose

oct 21 7662 miagrammopes trap line

Above if you look the right, there are alternating thick and thin strands of silk. Here is a closer view

oct 21 7662 silk puffs

And to the left is what I call a tangle ball (poorly focused) of silk, the residual of the tensioning process. I shall repeat this experiment. Why? Because it is thought that Miagrammopes has a single strand web and here, there are at least two trap lines originating from the same leaf. Is this true with others? I'll try to find out.

oct 21 7662 tangle ball

Odds and ends - A juvenile Nephila

oct 21 7529 nephila exoskeleton

A skipper

oct 21 7546 skipper

And the seed pod of a Simpoh flower

oct 21 7558 simpoh seed pod

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This work is licensed under a Creative Commons License.

C. Frank Starmer

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