Which insect group is defined by having spine-like projections and camouflage to prevent predation?

Which insect group is defined by having spine-like projections and camouflage to prevent predation?

• A. Mantids
• B. Treehoppers
• C. Cockroaches
• D. Cicadas

Answer: (B)

Spine-like projections used for camouflage are a defensive adaptation that helps an insect blend into its surroundings. Treehoppers have a prominent extension of the thorax called the pronotum, which often forms thorn-, horn-, or spike-like shapes. These projections mimic plant thorns or stems, allowing the insect to hide on the host plant and avoid predators. This masquerade is a classic example of camouflage through body form.

Mantids rely on ambush and their raptorial legs rather than thorn-like projections, so their defining features aren’t the spine-like camouflaging form. Cockroaches use a flattened body and quick escapes, not specialized spines for disguise. Cicadas rely on bark-like coloration and loud calls rather than thorny projections. Thus, the group best described by these spine-like, camouflage-providing extensions is the treehoppers.