Stephen Dalton / Silver argiope spider (Argiope argentata) juvenile on web showing stabilimentum, Costa Rica

Kim Taylor / Forest spider {Argiope sp}, note stabilimentum in centre of web, East Africa

Scott Leslie / Orb-weaver Spider (Araneidae) showing zig-zag silk constructions called stabilimentum, Everglades National Park, Florida

Piotr Naskrecki / Tiger Spider (Argiope savignyi) female on a web showing a distinct stabilimentum, an enforced part of the orb, Costa Rica

Piotr Naskrecki / Tiger Spider (Argiope savignyi) male on a web showing a distinct stabilimentum, an enforced part of the orb, Costa Rica

Kim Taylor / Orb web spider {Argiope bruennichi} female feeding on silk-wrapped prey in web showing stabilimentum, Isle of Wight, England.

Premaphotos / Wasp spider / Bruennich's argiope orb weaver spider (Argiope bruennichi) female on web showing stabilimentum, France

Premaphotos / Variable decoy spider (Cyclosa insulana) female on the stabilimentum in the centre of her web, in rainforest, Sumatra