Araneus Diadematus Spider Macro Stock Photo

It presents, at the level of the back of the abdomen, a folium a drawing that affects the form of an ornamental leaf characteristic used for its diagnosis. This drawing shows a set of white spots forming a cross and a brown middle part ending in a point, edged with a white sawtooth line. This drawing is also characteristic of a group of spears Araneus marmoreus, Araneus pallidus 4.nThese white spots come from the accumulation of guanine, a molecule acting as a white pigment synthesized in guanocytes on the periphery of intestinal diverticula5.nnThe cephalothorax is very hairy while the legs are very thorny.nnBoth sexes of the species have a rather different appearance, mainly in size sexual dimorphism. Thus, male individuals are less than one centimeter, while females can reach two centimeters and have a larger, rounded abdomen.nnMales measure from 4 to 11 mm and females from 10 to 22.5 mm6.nnAnother of its peculiarities is the creation of very large canvases compared to its own size, since they can reach exceptionally one meter, with particularly solid threads that crack dryly `pearl` sound when they break. The canvas is redone every day: the épeire does not repair his canvas and starts every morning Jean-Henri Fabre [ref. Necessary].nnNevertheless, many observations, but also videos of repairs of canvases available on the usual video networks show the opposite.