Thomisus onustus  Walckenaer, 1805
Main synonym = Thomisus hilarulus    Simon, 1875
Taxonomical Classification:  Animalia / Arthropoda / Arachnida / Araneae / Thomisidae
Humped Crab Spider     Brimba tal-fjuri
Further Information:
A rather common species distributed in most European countries (not found in the Northernmost countries like Ireland, Finland, Denmark, Norway and Iceland) and other continents from Portugal to Japan and South Africa.

They do not make webs to catch their prey but hide below or between flowers and slowly approach and catch visiting insects. The prey would hardly notice the advancing spider, because the latter has the remarkable ability to change colour of its body to mimic the same colour of the flower it resides on, so as it is camouflaged. This characteristic also helps it to be undetetcted by predators. It can assume yellow, white, pink and rose colours, but have not been reported to be blue. They hold their prey with the two powerful and highly enlarged front leg pairs and usually kill them by biting on the back of their neck. Emerging spiderlings may initially feed on pollen or nectar

The adult males reach a body length of only 2-4 millimetres, while females are 7-10 millimetres.Posterior part of abdomen bears two dorsal, hump-like protuberances. Mating takes place mainly in late Spring and unlike several spider species, the female remains passive and does not show any aggressive behaviour towards the male.

P.S. the spider have been placed from its residing yellow flower onto a pink one by the photographer to illustrate better the camoflauge spider.

Search for Thomisus onustus  in the following online resources:
Google Yahoo Lycos Wikipedia Index to Organism Names
Google Scholar Catalogue of Life EUNIS Database NCBI Database (inc. Pubmed) Scirus
Other Links and info
Funghi & Fauna Main Page Wild Plants Main Index Close This Window
Image Code:

(required to buy images in this page)
This website needs financial support through sponsors or advertisment - check here .
All material and data on this webpage is under the copyright of the author of this site - Stephen Mifsud / www.MaltaWildPlants.com / Malta. (2002-2010)
This research project about the flora of Malta is sponsored by: