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Thomisus onustus female

Thomisus onustus female
Photo Information
Copyright: Nikos Roditakis (NikosR) Gold Star Critiquer/Gold Note Writer [C: 76 W: 3 N: 447] (3436)
Genre: Animals
Medium: Color
Date Taken: 2015-09-23
Categories: Spiders
Camera: Nikon D5200, 90mm Tamron AF SP f/2.8 VC USD
Exposure: f/13.0, 1/400 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2015-09-24 7:54
Viewed: 984
Points: 10
[Note Guidelines] Photographer's Note
Thomisus onustus Walckenaer, 1805
Arachnida: Thomisidae

Here it is a white colored female of Thomisus onustus ready to crab the asian tiger (Aedes albopictus. As I tried to shoot the spider a mosquito was landed close to it so I shooted them together. The mosquito was the asian tiger, Aedes albopictus, a very dangerous mosquito because it is vector of many virus harmful to human e.g. West Nile Virus (WNY)etc. Recently WNV was isolated from samples of mosquitoes in Heraclion. Finally the mosquito escaped in few seconds and the spider failed to crab it. I considered this picture interesting and unique and I posted it.

Thomisus onustus is a very common Crab spider of cretan fauna. It shows an extreme sexual dimorphism both in size and coloration, also in comparison with othe crab spiders (6mm). Males are much more small about half in size (2-4mm).Its the basic colour of the prosoma varies from yellow brown to dark brown, the opisthosoma may be yellow and green or brown. Also females are very variable in colour, their basic colour can be white, yellow or pink.

As a matter of fact these crab-spiders hide themselves adapting the colour of their body to the colour of the flowers on which they are waiting for preys, a behaviour that conceal them from predators and from the pollinating insects.

Like other species of the family Thomisidae these crab spiders do not make a web, but actively pursue their preys. They usually wait for preys positioned for hunting on flowers. The spiders are disguised by assuming the same colour as the flower(see the picture) , fooling both insect and bird predators. The prey consists of flower-visiting insects of all species, such as hover flies, bees, wasps, butterflies or beetles, which are often several times larger than the spider. They take their preys with two powerful and highly enlarged front leg pairs and usually kill them by biting on the back of their neck. Emerging spiderlings of Thomisus onustus may feed on pollen or nectar when insect preys are lacking. (Source Wikipedia).

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Critiques [Translate]

Hello Nikos,

Another beautiful capture...
now good DOF and I like its BG too. Even a mosquito too.....
Good work....
Thanks for showing,

Ciao Nikos, lovely composition with fantastic spider on beautiful flower, great macro, wonderful colors, fine details, excellent clarity and splendid light, very well done, my friend, ciao Silvio

  • Great 
  • siggi Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 3097 W: 109 N: 12399] (52850)
  • [2015-09-24 12:10]

Hello Nikos,
Wonderful shot of this crab Spider with very impressive sharpness and colours. Superb lighting and exposure and you have captured it in a fine pose. Excellent POV and composition.
Regards Sigi

  • Great 
  • lousat Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 6595 W: 89 N: 15659] (65489)
  • [2015-09-24 15:19]

Hi Nikos,excellent capture of this crab spider ready for the dinner...ehhee..impressive sharpness,not easy,and very nice composition too.Have a nice day and thanks,Luciano

Outstanding picture Nikos.

Thanks for sharing.


  • Great 
  • tuslaw Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2754 W: 282 N: 4931] (19883)
  • [2015-09-27 18:07]

Hello Nikos,
What a neat capture of both spider and mosquito together on this pretty little flowering plant. Focus is sharp giving us a great look at spider, mosquito and flower. Colors are well saturated and natural looking. I like the overall composition and exposure is right on the money. I wonder if the mosquito realized how close it was to becoming dinner:) Well done!!

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