Project Noah

Project Noah is a tool to explore and document wildlife and a platform to harness the power of citizen scientists everywhere.

Join Project Noah Today

Heather crab spider

Thomisus onustus


Thomisus onustus is a crab spider species in the genus Thomisus and it has a Palearctic distribution . This species shows an extreme sexual dimorphism both in size and coloration, also in comparison with other crab spiders. The adult males reach a body length of only 2–4 millimetres, while females are 7–10 millimetres long. In males 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 preys. Mating takes place mainly in June. The male climbs onto the back of the female to copulate. Finally, the male leaves the female. The female during the entire mating is completely passive and does not show any aggressive behaviour. This cute couple was spotted while mating, in a prairie near Volos Greece.

No species ID suggestions

Βόλος, Αποκεντρωμένη Διοίκηση Θεσσαλίας - Στερεάς Ελλάδας, Greece

Lat: 39.36, Long: 22.98

Spotted on May 24, 2017
Submitted on May 24, 2017

Related spottings

Thomisus Crab Spider Crab Spider Gehöckerte Krabbenspinne Thomisus onustus Crab Spider

Nearby spottings

Checkered beetle Chilostoma land snail Valerian (Βαλεριάνα) Harvestman