Ozyptila trux

Ozyptila trux is a species of spider that belongs to the family Thomisidae. These spiders are commonly known as crab spiders, due to their crab-like appearance and movement. The species name, trux, is derived from the Latin word for “savage” or “fierce,” which is a fitting description for this predatory spider.

Description and Distribution

Ozyptila trux is a relatively small spider, with females reaching a body length of around 5mm, while males are slightly smaller, at around 4mm. They have a distinctive body shape, which is flattened and wider than it is tall, giving them a crab-like appearance. Their legs are short and strong, with two pairs facing forward and two pairs facing backward, allowing them to move quickly and easily in any direction.

These spiders are found throughout much of Europe, including the UK, where they are relatively common. They prefer dry, sunny habitats such as meadows, hedgerows, and woodland edges. They are also commonly found on flowers, where they wait to ambush pollinating insects.

Behavior and Diet

Ozyptila trux is a sit-and-wait predator, meaning that it does not actively hunt for prey, but instead waits for potential prey to come within striking distance. They are ambush predators, waiting patiently on flowers or other vegetation for pollinating insects to land nearby. Once their prey is within range, they strike quickly, immobilizing their victim with a venomous bite before consuming it.

These spiders are known to feed on a wide range of insects, including bees, flies, and moths. They are particularly effective at catching bees, due to their ability to blend in with the flowers that bees are attracted to. This camouflage is achieved through their ability to change color, allowing them to match the color of the flower they are sitting on. This makes them virtually invisible to their prey, allowing them to get in close before striking.

Reproduction and Life Cycle

Little is known about the reproduction and life cycle of Ozyptila trux. Like many spider species, they likely undergo a complex courtship ritual before mating. The female then lays her eggs in a silk cocoon, which she guards until they hatch. The spiderlings emerge from the cocoon and undergo a series of molts before reaching adulthood.

Conservation Status

Ozyptila trux is not currently considered a threatened species. However, like many spider species, they are vulnerable to habitat loss and fragmentation, which can impact their ability to find suitable prey and mates. As such, it is important to conserve and protect the habitats in which these spiders are found.


Ozyptila trux is a fascinating and impressive spider species that is well adapted to its environment. With its crab-like appearance and sit-and-wait predatory behavior, it is a formidable predator of a wide range of insects. While relatively little is known about their life cycle and behavior, their ability to blend in with their surroundings and change color makes them a remarkable example of adaptation and evolution in the natural world.

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