The Cucumber green spider (Araniella cucurbitina) is a spider of the Araneidae family. Females grow up to 8 mm, males only up to 5 mm. The spider is mainly found on forest clearings, where it weaves its orb-web between leaves and flowers. These webs are only about 10 cm in diameter.
This spider does not use a hideout, because it is camouflaged by its green colour. Adult spiders first show this color in spring. Freshly hatched spiderlings are red and change to brown until fall. On the end of the abdomen

Abdomen

In vertebrates such as mammals the abdomen constitutes the part of the body between the thorax and pelvis. The region enclosed by the abdomen is termed the abdominal cavity...

 there is a red mark in adults.

These spiders occur in the Palaearctic, although it can be found in parts of North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

, where it was probably introduced.

Araniella opisthographa is an almost identical spider which can only be distinguished from A. cucurbitina by a microscopic investigation.