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Insects and other arthropods

Pinacate beetles

English
Eleodes spp.

Tabs group

Description

Pinacate beetles, from the Eleodes genus, live in the semi-desert regions of western North America. They have a thick, waxy exoskeleton that allows them to withstand temperatures of up to 50 degrees Celsius without losing too much moisture.

Their long legs help keep their bodies elevated above the sun-heated ground.

These legs are also useful for running and digging. Pinacate beetles can burrow into the soil to take refuge where the temperature is less intense.

Beetles from the Eleodes genus are known for their defensive behaviour. When threatened, they lower their heads and raise their abdomens in the air. In this position, they can release a foul-smelling liquid as a defense mechanism.

Clever hydration

At dawn, tiny droplets of water form on the waterproof cuticle of these beetles. The droplets gradually build up until they flow—by gravity—from the beetle’s abdomen down to its mouth.

These beetles tilt forward to collect the morning dew that has settled on their bodies.

Life cycle

Eggs incubation last about 10 days, depending on species and temperature.

The lifespan of juveniles is 2 to 3 months. The nymph lives for about 14 days and the adult for 2 to 4 months.