Jumping Spider with ???
|[Note Guidelines] Photographer's Note|
|This little jumping spider was caught having an unusual meal. This is about 60% cropped image. Still I was able to get good details of eyes I hope. I don't know what species it is. Now some information about jumping spiders:|
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).
Jumping spiders have very good vision centered in their anterior median eyes (AME). Their eyes are able to create a focused image on the retina, which has up to four layers of receptor cells in it (Harland & Jackson, 2000). Physiological experiments have shown that they may have up to four different kinds of receptor cells, with different absorption spectra, giving them the possibility of up to tetrachromatic color vision, with sensitivity extending into the ultra-violet range. It seems that all salticids, regardless of whether they have two, three or four kinds of color receptors, are highly sensitive to UV light (Peaslee & Wilson, 1989). Some species (for example, Cosmophasis umbratica) are highly dimorphic in the UV spectrum, suggesting a role in sexual signaling (Lim & Li, 2005). Color discrimination has been demonstrated in behavioral experiments.
The principal eyes have high resolution (11 min. visual angle), but the field of vision is narrow, from 2-5 degrees.
Because the retina is the darkest part of the eye and it moves around, one can sometimes look into the eye of a jumping spider and see it changing color. When it is darkest, you are looking into its retina and the spider is looking straight at you.
Their Mission (Eating & Reproduction Habits):
The jumping spider is an active predator, usually hunting during daylight. It will stalk to within a few body lengths of the prey, crouch, crawl slowly forward, and then lift its front legs and pounce. It accomplishes its spectacular jumps by means of muscular contractions in the body that force body fluids into the legs, causing the legs to extend rapidly. Most jumping spiders feed on insects, while others feed primarily on web-building spiders.
Jumping spiders capture their prey by jumping on it from several inches away, and they may jump from twig to twig or leaf to leaf. They can jump many times their body length. They can carry out complex maneuvers such as detours around obstacles in order to reach their prey. Their eyesight is much better than that of other spiders and most, if not all, insects. Most other spiders will only eat prey that they have captured live because they are unable to see dead prey (some long-legged sac spiders and anyphaenid sac spiders are exceptions as they recognize insect eggs as food) but jumping spiders will eat flies that have been killed for them. One jumping spider (Evarcha culicivora) is even known to only capture mosquitos full of blood, using their eyesight and smell.
Even if there are no spiders that are pure herbivores, there are some jumping spiders which include nectar in their diet (Jackson et al., 2001). So far none are known to feed on pollen or seeds. When insects land on plants such as the partridge pea, which offers the spiders nectar through their extrafloral nectaries, the jumping spiders help protect the plant in return by killing and eating insects that might damage the plant.
In many species the male performs complex courtship displays in which he bobs his body and waves his front legs in a highly specific manner. After mating, the female lays her eggs in a silk-lined shelter under stones or bark, or on the surface of plants. The female will often guard the eggs and newly hatched young.
Jamesp, jaycee, nglen, fartash, cicindela, Patleboss, Necipp, gracious, mecamich, marhowie, oscarromulus, parthasarathi, angybone, cataclysta, jmirah has marked this note useful
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- [2007-09-26 8:56]
Great diagonal composition. The detail is very good - especially the eyes.
- [2007-09-26 9:08]
Fantastic macro of the spider. Wonder what the prey is. The eyes are amazing!
- [2007-09-26 10:02]
Hi Haraprasan. great close up of the spider. showing fine detail and colour.great pair of green eyes .a nice POV. well done TFs. good notes too.
Very nice shot of this Jumping Spider,
Great focusing,lighting and sharpness,
Really I am not sure what is the prey (another small spider?) but the close up is really nice. You kept a very good eye contact with hero of this presentation. Details are also good, only the noises could be reduced a little :)
TFS and have a nice evening!
Hello Haraprasan, wonderfull macro-shot, great details especialy in the eyes , splendid colors and sharpness, lovely composition too,
- [2007-09-26 13:13]
Hi Haraprasan nice details great catchlights in the eyes well caught tfs rgds Necip.
oh! what a huge close up you had here!
yes, you managed to bring up the sharpness of the eyes alright!
well done and well composed
Waoohh,impressionante macro mais je ne voudrais pas être sa proie.Bravo
Hi Haraprasan, splendid macro with wonderful details, amazing the eyes of spider, great capture, very well done, ciao Silvio
I like the POV and those big black eyes Haraprasan :)
Well composed with nice detail, color, and flashwork.
Great notes Haraprasan.
The photography has no equal. MAGNIFICIENT.!!!
Mario, your friend in Canada.
Interesting shot...great detail in the eyes!!!
I like this shot. Great moment and good note. Sharpness is pretty ood but I still think that you could crop is less for better sharpness and less noisy buckground.
PS Thank you for your last uceful critique
- [2007-09-27 7:45]
Excellent macro of this spider.The details are sharp and well focused.The textures and colours are wonderful.Well composed with lovely eye contact.TFS
je ne sais pas ce que c'est devant l'araignée(peu de temps ce soir pour traduire les notes)mais j'adore les grand yeux de cette espece.
bonnes netteté et couleurs.
- [2007-09-28 14:36]
WOW!! Excellent close-up of the spider with it's strange looking meal. The eyes are outstanding along with color and detail. Very well captured.