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Jumper Face


Jumper Face
Photo Information
Copyright: al coroza (alpo430) Silver Note Writer [C: 0 W: 0 N: 15] (119)
Genre: Animals
Medium: Color
Date Taken: 2009-01-11
Categories: Insects
Camera: Canon Powershot s5is, raynox dcr 250 macro conversion lens
Exposure: f/8, 1/60 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2009-05-18 2:57
Viewed: 4132
Points: 8
[Note Guidelines] Photographer's Note
The jumping spider family (Salticidae) contains more than 500 described genera and over 5,000 species, making it the largest family of spiders with about 13% of all species (Peng et al., 2002). Jumping spiders have good vision and use it for hunting and navigating. They are capable of jumping from place to place, secured by a silk tether. Both their book lungs and the tracheal system are well-developed, as they depend on both systems (bimodal breathing).

Habitat

Jumping spiders live in a variety of habitats. Tropical forests harbor the most species, but they are also found in temperate forests, scrub lands, deserts, intertidal zones, and even mountains. Euophrys omnisuperstes is a species reported to have been collected at the highest elevation, on the slopes of Mt. Everest (Wanless, 1975).

Jumping spiders are generally recognized by their eye pattern.

Behavior

Jumping spiders are generally diurnal, active hunters. Their well developed internal hydraulic system extends their limbs by altering the pressure of body fluid (blood) within them. This enables the spiders to jump without having large muscular legs like a grasshopper. The jumping spider can therefore jump 20 to 60 or even 75-80 times the length of their body. When a jumping spider is moving from place to place, and especially just before it jumps, it tethers a filament of silk to whatever it is standing on. Should it fall for one reason or another, it climbs back up the silk tether. Jumping spiders are Scopula bearing spiders, which means that they have a very interesting Tarsal section. And the end of each leg they have hundreds of tiny hairs, which each then split into hundreds more tiny hairs, each tipped with an "end foot". These thousands of tiny feet allow them to climb up and across virtually any terrain. They can even climb up glass by gripping onto the tiny imperfections, usually an impossible task for any spider.

Jumping spiders also use their silk to weave small tent-like dwellings where females can protect their eggs, and which also serve as a shelter while moulting.

Jumping spiders are known for their curiosity. If approached by a human hand, instead of scuttling away to safety as most spiders do, the jumping spider will usually leap and turn to face the hand. Further approach may result in the spider jumping backwards while still eyeing the hand. The tiny creature will even raise its forelimbs and "hold its ground". Because of this contrast to other arachnids, the jumping spider is regarded as inquisitive as it is seemingly interested in whatever approaches it.

http://en.wikipedia.org/wiki/Jumping_spider

ramthakur, cicindela has marked this note useful
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Critiques [Translate]

Your Raynox is a powerful tool in your adept hands, AC.
My goodness, what a razor sharp macro of the Jumping Spider's eyes! It is sheer magic.
The entire frontal area of the subject facing the camera has been magnified very well with superb details and rich and natural colours.
Bravo and thanks!
Ram

Great macro and informative note!
TFS,
Regards,
Michael

Hello Al and welcome among TN members!
Great close-up with wonderful eye-contact! This is not too easy to take such good macro!
I like DOF and sharpness. Note is also very good and informative.
Greetings,
Radomir

PS. If you agree I would like to add this phot to the theme "Salticidae of the world" :>

Beautiful work Al,
I've seen good stuff done with the Raynox DCR 250.
I have the DCR 150 (given to me by Joe Kellard (joey) and have used it mostly with my Lumix
Have just got the Powershot SX10 IS though so am looking forward to using them together more.
I'm beginning to want the 250 now too ;)
Cheers
Steve

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