Why are poison dart frogs often brightly colored?

Why are poison dart frogs often brightly colored?

• A. To attract mates through visual cues only.
• B. To warn predators of their toxicity.
• C. To camouflage in leaf litter.
• D. To regulate body temperature.

Answer: (B)

Bright colors signal danger to potential predators, a pattern called aposematic coloration. Poison dart frogs carry potent toxins on their skin, which can make them unpalatable or harmful if eaten. The vivid hues act as a clear warning so predators learn to avoid them after a negative experience, reducing the chance of an attack. This deterrent strategy is more efficient than relying on hiding or fighting off every predator. While color can play some role in mating in some species, the primary evolutionary purpose of their bright appearance is to warn off predators. Camouflage would require dull, blending colors, and regulating body temperature isn’t driven by skin color.

Bright colors signal danger to potential predators, a pattern called aposematic coloration. Poison dart frogs carry potent toxins on their skin, which can make them unpalatable or harmful if eaten. The vivid hues act as a clear warning so predators learn to avoid them after a negative experience, reducing the chance of an attack. This deterrent strategy is more efficient than relying on hiding or fighting off every predator. While color can play some role in mating in some species, the primary evolutionary purpose of their bright appearance is to warn off predators. Camouflage would require dull, blending colors, and regulating body temperature isn’t driven by skin color.