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| [Note Guidelines] Photographer's Note |
Friends
My yesterday's posting was on the spider resting. I somehow want to see the full view of the spider. So I tookout one small stick and made the spider to stand to the occassion. It happend the spider immediately took different direction ( I did not expect) and made my POV difficult but still I managed to shoot. You can also see from the photo its on the process of spinning its WEB. Hope you all like it.
Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Morphology
==========
Spider anatomy:
(1) four pairs of legs
(2) cephalothorax
(3) opisthosomaSpiders, unlike insects, have only two body segments (tagmata) instead of three: a fused head and thorax (called a cephalothorax or prosoma) and an abdomen (called the opisthosoma). The exception to this rule are the assassin spiders, whose cephalothorax seems to be almost divided into two independent units. Except for a few species of very primitive spiders (family Liphistiidae), the abdomen is not externally segmented. The abdomen and cephalothorax are connected with a thin waist called the pedicle or the pregenital somite, a trait that allows the spider to move the abdomen in all directions. This waist is actually the last segment (somite) of the cephalothorax and is lost in most other members of the Arachnida (in scorpions it is only detectable in the embryos.
Respiration and circulation
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Spider showing its epigyneSpiders have an open circulatory system; i.e., they do not have true blood, or veins to convey it. Rather, their bodies are filled with haemolymph, which is pumped through arteries by a heart into spaces called sinuses surrounding their internal organs.
Digestion
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Spiders can only eat their food in liquid form. For this purpose predigestion is carried out both internally and externally to liquify the tissues of their prey. Some spiders do this by spitting up digestive juices onto prey while chewing it with their chelicerae. The resulting liquified "soup" is then then sucked up by the spider. Dense combs of hairs around the mouth filter out solids while the spider ingests the liquids. Undigested or uneaten parts of the prey are later discarded. Some spiders do not chew their food, but inject digestive fluids directly into the body of the prey to liquify the inner tissues and organs. The spider then sucks out the liquified tissues, eventually leaving the empty outer exoskeleton of the prey.
Size
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Spiders occur in a large range of sizes. The smallest, dwarf spiders of the subfamily Erigoninae, are less than 1 mm (about .05 inches) in body length. The largest and heaviest spiders occur among tarantulas, which can have body lengths up to 90 mm (about 3.5 inches) and leg spans up to 250 mm (about 10 inches.
Lifespan
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Many spiders may only live for about a year, but a number will live two years or more, overwintering in sheltered areas. The annual influx of 'outdoor' spiders into houses in the fall is due to this search for a warm place to spend the winter. It is common for female tarantulas to live up to twenty years.
Thanks for looking.
Rgds
Ganesh |
jaycee, lousat, PaulGana, Luis52, jusninasirun, haraprasan, rousettus, Maite has marked this note useful
Only registered TrekNature members may rate photo notes. |
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- jaycee
![Gold Star Critiquer/Gold Note Writer [C: 1672 W: 8 N: 4021]](http://i1.treknature.com/misc/g-n-g.gif)
(13253) - [2008-04-23 9:17]
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Hi Ganesh,
Two good shots of this acrobatic spider. Interesting to see how he is weaving his web. You captured two great poses, both with excellent colors and details. He looks wonderful amidst the green leaves.
Jane
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- lousat
(7669)
- [2008-04-23 9:18]
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Hi Nara,what a incredible quality! Wonderfull sharpnes and colours,perfect light,not easy to take 2 pics like that so perfectly,my best compliments,have a nice day,Luciano
nice focus and detail, too bad you couldn't get a third angle of it, I wonder what kind of spider it is
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- Luis52
(9890)
- [2008-04-23 10:28]
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Hola Narayanan.
fina presentacion y exelente encuadre para mostrar esta hermosa Araņita realizando su trabajo diario. Muy hermosas fotos .
Saludos
Luis52.
Hi Ganesh, splendid capture of amazing spider, great collage with superb details and excellent sharpness, very well done, ciao Silvio
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- joey
![Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 1555 W: 233 N: 5071]](http://i1.treknature.com/misc/g-g-g.gif)
(17907) - [2008-04-23 14:53]
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Hi Ganesh,
a great pair of macros of this spider!
Very good sharpness in both!
Great composition and I like the two different POVs.
Well done my friend!
Joe
Hello Ganesh. Nicely captured sequence and you are right about the title. Excellent sharp texture of the image in good focus and very pleasant muted background. Best regards. Jusni
Hi Ganesh Ji,
OH! so its alive. A nice collage of this spider. Excellent composition in both frames. Very good sharp details and a very good DOF maintained here. Thanks a lot for sharing.
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- mariki
(6903)
- [2008-04-24 12:21]
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Hello Ganesh,
Sorry no time. Only marking.
Mariki
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- Maite
(4856)
- [2008-04-25 0:39]
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A bit bloodcurling but magnificent job! Outstanding details on both sides of the spider. I like a lot the composition and, even it being a spider, it results really beautiful.
Congratulations and thank you very much for sharing it and the interesting information.
Best regards
Maite
