Why do sloths have algae growing on their fur?
Quick Answer
Sloths can develop algae in their fur because they move slowly and their coat provides a damp habitat for tiny organisms. The algae may help with camouflage by making them look greener in the canopy.
The Full Story
A sloth’s slow movement and coarse, grooved fur create conditions where algae and other microorganisms can live. Rainwater and humidity in tropical forests help the algae grow, especially on three-toed sloths. This green tint can reduce visibility to predators by blending the animal into leaves and branches. The fur may also host moths and other insects, making the sloth’s coat an entire tiny ecosystem. Scientists have studied the relationship as an example of mutualism and camouflage in mammals.
Key Facts
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"The animal that wears a living green coat"
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