True flies are insects of the order Diptera. The most obvious distinction from other orders of insects is that a typical fly possesses a pair of flight wings on the mesothorax and a pair of halteres, derived from the hind wings, on the metathorax.
A spider web, spiderweb, spider's web, or cobweb is a device created by a spider out of proteinaceous spider silk extruded from its spinnerets. Spider webs have existed for at least 100 million years, as witnessed in a rare find of Early Cretaceous amber. Insects can get trapped in spider webs, providing nutrition to the spider; however, not all spiders build webs to catch prey, and some do not build webs at all.
Uploaded: Aug 15, 2015