Invertebrates
Longhorn Beetle
Cerambycidae · also called longhorn beetles, long-horned beetle
A beetle rests on a tree trunk with antennae stretching out several times the length of its own body, a proportion so exaggerated that a longhorn beetle can look almost more antenna than insect at first glance.
Overview
The longhorn beetle, family Cerambycidae, is an enormously diverse group of wood-associated beetles found in forest habitat across nearly every region of the world. Its extraordinarily long antennae, wasp-mimicking colouration in some species, and status as one of the largest beetle families on Earth make it one of the most visually striking and ecologically significant insect groups most people will encounter.
Antennae built to make a statement
Few insects carry sensory equipment as visually dramatic as a longhorn beetle’s antennae, which in some species dwarf the rest of the insect entirely, turning a modestly sized beetle into a genuinely eye-catching sight.
Status
Least Concern — widespread and abundant across suitable forest habitat worldwide, given the family’s enormous diversity.
Longhorn Beetle: common questions
Why do some longhorn beetles have such long antennae?
A longhorn beetle's antennae, which can stretch several times the length of its own body in some species, are used primarily to detect chemical and physical cues from the environment, including potential mates and suitable wood for egg-laying, with an antennae-to-body ratio among the most exaggerated of any insect family.
Are longhorn beetles harmful to trees?
Some species can be — a longhorn beetle larva tunnels through wood as it feeds and grows, and certain species are considered serious pests capable of damaging timber, stored wood products, or even living trees, though the vast majority of the family's thousands of species pose no significant threat.
How does a longhorn beetle mimic a wasp?
Certain species have evolved colouration and body shapes, including narrow waists and yellow-and-black banding, that closely resemble stinging wasps, a visual bluff that may deter predators which have learned to avoid the pain of a genuine wasp sting.
How many species of longhorn beetle are there?
This family includes more than 35,000 described species worldwide, making it one of the most diverse beetle families on the planet, with representatives found in forest habitat across nearly every region of the world.