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Submitted on
February 2
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Camera Data

Make
Canon
Model
Canon EOS 5D Mark II
Shutter Speed
1/160 second
Aperture
F/16.0
Focal Length
100 mm
ISO Speed
320
Date Taken
Jan 12, 2014, 2:35:46 AM
Software
Adobe Photoshop CS4 Windows
Sensor Size
6mm
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Portia Jumping Spider by melvynyeo Portia Jumping Spider by melvynyeo
A very smart spider :) Taken at night in Singapore.

Quote from en.wikipedia.org/wiki/Portia_%…
Portia is a genus of jumping spider which feeds on other spiders (araneophagic). They are remarkable for their intelligent hunting behaviour which suggests they are capable of learning and problem solving, traits normally attributed to much larger animals.

Portias often hunt in ways that seem intelligent.[2] Their favorite prey appears to be web-building spiders between 10% and 200% of the Portia’s size. Portias look like leaf detritus caught in a web, and this is often enough to fool web-building spiders, which have poor eyesight.[2] When stalking web-building spiders, Portias try to make different patterns of vibrations in the web that aggressively mimic the struggle of a trapped insect or the courtship signals of a male spider, repeating any pattern that induces the intended prey to move towards the Portia.[3] Portia fimbriata has been observed to perform vibratory behavior for three days until the victim decided to investigate.[4] They time invasions of webs to coincide with light breezes that blur the vibrations their approach causes in the target's web; and they back off if the intended victim responds belligerently. Portias that retreat may approach along an overhanging twig or rock, descend down a silk thread and kill the prey. Other jumping spiders take detours, but Portia is unusual in its readiness to use long detours that break visual contact.

Laboratory studies show that Portia learns very quickly how to overcome web-building spiders that neither it nor its ancestors would have met in the wild. Portia’s accurate visual recognition of potential prey is an important part of its hunting tactics. For example in one part of the Philippines local Portia spiders attack from the rear against the very dangerous spitting spiders, which themselves hunt jumping spiders. This appears to be an instinctive behavior, as laboratory-reared Portias of this species do this the first time they encounter a spitting spider. On the other hand they will use a head-on approach against spitting spiders that are carrying eggs. However, experiments that pitted Portias against "convincing" artificial spiders with arbitrary but consistent behavior patterns showed that Portia’s instinctive tactics are only starting points for a trial-and-error approach from which these spiders learn very quickly.[3] Nonetheless, they seem to be relatively slow "thinkers", as they solve tactical problems by using brains vastly smaller than mammalian predators'.[2] Against other jumping spiders, which also have excellent vision, Portias may mimic fragments of leaf litter detritus. When close to biting range, Portias use different combat tactics against different prey spiders. On the other hand they simply stalk and rush unarmed prey such as flies,[5] and also capture prey by means of sticky webs.
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:iconthedmg177:
theDMG177 Mar 30, 2014  Hobbyist General Artist
They even have some kind of complex body language!
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:icona-map:
a-map Mar 28, 2014  Professional Digital Artist
^    ^
oOOo
_ w _

I make a spider face
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:iconoctoboy-the-8th:
Ahh, the portia. The genius of the invertebrate world. This one sure seems to have an inquisitive expression with its big, ponderous eyes. Great front shot of this spider. 
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:iconbillythehog:
Billythehog Feb 25, 2014  New member Professional Interface Designer
:D

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:iconhannahelizabethh:
hannahelizabethh Feb 22, 2014  Student General Artist
big eyes! :)
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:iconknight585:
I love jumping spiders! Excellent work =]
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:iconigarcia:
igarcia Feb 12, 2014  Hobbyist Photographer
She is perfectly beautiful.
Reply
:iconomnivoreart:
OmnivoreArt Feb 10, 2014  Professional General Artist
Your work is spectacular. I had the privilege of living in Australia for 4 years and got to see some amazing insects/arachnids. I also really appreciate the information you add in your posts. You clearly love your subject matter. Have you seen Microcosmose the film?
Reply
:iconmelvynyeo:
Yes, i saw that documentary... amazing videography
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