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crab spider


crab spider
Photo Information
Copyright: Siegfried Potrykus (siggi) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3097 W: 109 N: 12399] (52850)
Genre: Animals
Medium: Color
Date Taken: 2012-08
Categories: Insects
Photo Version: Original Version
Date Submitted: 2012-08-21 8:41
Viewed: 1642
Points: 24
[Note Guidelines] Photographer's Note
Misumena vatia is a species of crab spider with holarctic distribution. In North America, where it is the largest and best-known flower spider, it is called the goldenrod crab spider or flower (crab) spider, because it is commonly found hunting in goldenrod sprays in the autumn.
Young males in the early summer may be quite small and easily overlooked, but females can grow up to 10 mm (excluding legs); males reach 5 mm at most.
These spiders may be yellow or white, depending on the flower in which they are hunting. Especially younger females, which may hunt on a variety of flowers such as daisies and sunflowers, may change color "at will". Older females require large amounts of relatively large prey to produce the best possible clutch of eggs. They are therefore, in North America, most commonly found in goldenrod (Solidago sp.), a bright yellow flower which attracts large numbers of insects, especially in autumn. It is often very hard even for a searching human to recognize one of these spiders on a yellow flower. These spiders are sometimes called Banana Spiders because of their striking yellow color.
The much smaller males scamper from flower to flower in search of females and are often seen missing one or more of their legs. This may be due either to near misses by predators such as birds or to fighting with other males.
When a male finds a female, he climbs over her head over her opisthosoma onto her underside, where he inserts his pedipalps to inseminate her.
The young reach a size of about 5 mm by autumn and spend the winter on the ground. They molt for the last time in May of the next year.
These spiders change color by secreting a liquid yellow pigment into the outer cell layer of the body. On a white base, this pigment is transported into lower layers, so that inner glands, filled with white guanine, become visible. If the spider dwells longer on a white plant, the yellow pigment is often excreted. It will then take the spider much longer to change to yellow, because it will have to produce the yellow pigment first. The color change is induced by visual feedback; spiders with painted eyes were found to have lost this ability.
The color change from white to yellow takes between 10 and 25 days, the reverse about six days. The yellow pigments have been identified as kynurenine and 3-hydroxykynurenine(Wikipedia)

summers, josediogo1958, maaciejka, marius-secan has marked this note useful
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Critiques [Translate]

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2012-08-21 8:48]

Hi Siggi,the perfect point of view to see the dramatic end of the black fly,great light management for the best white,excellent details everywhere,i like the famous camouflage of the carb spider whit the flowers.Have a nice evening and thanks,Luciano.

  • Great 
  • joska Gold Star Critiquer/Gold Note Writer [C: 806 W: 0 N: 4092] (22535)
  • [2012-08-21 10:10]

Hello Siggi,
Excellent photo presentation of this species of Spider, greart sharp photo and useful description, thanks for sharing!

great shot Siegfried
good sharpness and great details
i like the colours
thanks greeting lou

  • Great 
  • PeterZ Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 5137 W: 166 N: 13121] (49139)
  • [2012-08-21 12:09]

Hello Siggi,
When I opened the thumbnail I saw the drama in reality. The spider is very well camouflaged. A macro in superb sharpness, details and very beautiful colours with a nice dark background. Pleasing composition.
Regards,
Peter

Ciao Siggi, poor fly, great action shoot, lovely composition with nice flower, beautiful natural colors, splendid sharpness and fine details, very well done, my friend, ciao Silvio

Another great macro Siggi! Interesting subject, very good composition, wonderful lighting and impressive sharpness.
Regards,
Christodoulos

  • Great 
  • iti Gold Star Critiquer/Gold Note Writer [C: 577 W: 0 N: 650] (7939)
  • [2012-08-21 23:27]

Hi Siegfried,
This is an excellent capture of this everyday drama of nature.
Regards Jiri.

  • Great 
  • summers (705)
  • [2012-08-21 23:47]

Hello Siggi, The contrast between the dark fly and the pale spider makes this really dramatic. Geoff

Hello Siegfried
Great macro of this decisive moment.Excellent composition.wonderful colours,light and details.Thank You.
Have a good day!
Best regards
J.Diogo

hello Siegfried,
a great example of prey and predator. very well taken picture from a good PoV. great DoF,
OoF back ground and very sharp subject makes it real.
best wishes,
samiran

Czesc Siggi,
bardzo ciekawe to zdjecie - choc dramatyczne :)
Super ujecie. Bardzo dobra prezentacja, ostrosc i szczegoly.
Pozdrawiam,
Maciek

Hello Siegfried,
Incredible catch of a spider attack on a fly. It is a interesting image taken from a very good POV. Amazing details, very good focus and sharpness. The spider has excellent camouflage colors.....
Thanks for sharing!
Marius.

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