It's a dietary thing. THey're not poisonous, they're just immune to poison and the things they eat are poisonous.
It's like the Barking Mouse RatPika - they collect food for the winter based on the toxicity of the plants, and they eat the plants in order of poisonousness - the poisons are preservatives, and as the poisons decay into harmlessness, the plants stay ripe. The most poisonous of the plants last the longest, meaning they become edible at about the point the Barking Mouse Rat runs out of the previous plants.
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Date: 2007-08-04 12:33 am (UTC)It's like the
Barking Mouse RatPika - they collect food for the winter based on the toxicity of the plants, and they eat the plants in order of poisonousness - the poisons are preservatives, and as the poisons decay into harmlessness, the plants stay ripe. The most poisonous of the plants last the longest, meaning they become edible at about the point the Barking Mouse Rat runs out of the previous plants.