The colourful poison-arrow frogs of Central and South America secrete a poisonous toxin through their skin, which paralyses the muscles and can lead to death within 20 minutes in humans. The frogs are called poison-arrow frogs because these toxins have been used by Native Americans in the poisoning of their arrows to kill animals quickly. Poison-arrow frogs frequently spawn in the water-filled leaf funnels of plants, which are located high up in the trees.
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