Arrowhead Orbweaver

Fascinating facts about the Arrowhead Orbweaver

• Verrucosa arenata is one of the few large orb-weavers that sits facing upwards in its web, with its cephalothorax pointing toward the sky at the centre of the structure. Females usually occupy this central hub because it offers the best position for intercepting prey. Their webs are down-biased asymmetric, giving them a top-biased shape that improves capture efficiency.
• When an insect becomes entangled, V. arenata runs toward the victim, pauses, and then pulls the prey toward itself while descending the web. After a brief plucking of the radial threads, the spider shakes its whole body - a motion known as bouncing - before reeling the catch by pulling on the thread as it approaches.
• Unlike most orb-weavers that have bulbous abdomens, V. arenata possesses a sharply triangular, arrow-shaped abdomen that gives the species its common name. The abdomen's pointy form contrasts with the spider's relatively small head, making the triangular silhouette very distinctive. This shape is highlighted by a coloured triangle on the dorsal surface, usually white or yellow, which can reflect ultraviolet light.
• White arrowhead spiders are more common during the breeding season and tend to be in better condition than their yellow counterparts. Yellow morphs attract more insects to the web.
• The capture web of the arrowhead orb-weaver is almost invisible to insects, composed of a near-transparent silk mesh that hides the structure from prey. Its elliptical shape with an elongated hub gives the spider a central position for optimal interception, while the silk strands are tougher and stretchier than those of most orb-weavers. Because the silk can endure higher pulling forces, the spider can reel in prey without breaking the web.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Arrowhead Orbweaver

In the warm, golden light of dawn, the Arrowhead Orbweaver emerges, its delicate, angular form unfolding like a tiny, eight-legged kite as it takes to the air, its gossamer threads streaming behind it like a bridal veil. With an effortless, ethereal elegance, it dances on the breeze, its orb-shaped web a masterful, intricate snare that awaits the unsuspecting insects that will soon become its prey. As it weaves and spins, the Arrowhead Orbweaver embodies the very essence of patience and precision, a tiny, fascinating marvel of the natural world.

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