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La serpiente de cascabel de la isla de Aruba está entre las serpientes de cascabel más raras del mundo y enumeradas entre las especies en peligro.

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Pasa la mayor parte del tiempo enrollada en una rama con la cabeza entre el cuerpo. De hábitos crepusculares, al atardecer inicia su búsqueda de presas a las que mata por constricción.

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All bush babies are nocturnal and tree-dwelling. In general they are solitary creatures, though you can see them in pairs. They have a wide range of vocal sounds, signs and postures which make up an elaborate language capable of sending complex messages to other bush babies some distance away.

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All scorpions are viviparous, i.e. their young are born after developing in the mother’s abdomen, taking nutrients for growth directly from her. Parental care is very important in this species, as when the young are very small they travel on their parents’ backs to avoid being eaten by predators. It has been noted that there is a significantly higher life expectancy in young scorpions when they stay together in family groups.

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They spend the whole day buried in the sand, only coming out of their shelter at dusk to lie in wait on paths frequented by rodents. They are able to bury themselves in the sand extremely quickly, making quick muscular movements, and move along the sand by sliding sideways. To hunt, they stick their horned protuberances up above the sand, which act as bait for their prey, at which point the viper traps them. Their venom is haemotoxic.

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The skin of this amphibian exudes a poisonous substance that causes nausea and vomiting in the predators that try to eat it. Natives take advantage of this feature to make poisoned darts. They impale the frogs on a stick and hold them close to the fire to get them to sweat as much as possible to extract the maximum precious venom for their darts. They also rub the darts on the back of living frogs.

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To hunt and defend themselves, they secrete an efficient poison from glands in the lower jaw which flow out through fleshy grooves in their teeth. They attack their victims by biting them and gripping onto them while rolling over onto their backs to ensure the venom penetrates their wounds, while continuing to chew to inflict even larger wounds.

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The rattlesnake has fangs more than half and inch longer. Its venom has a highly hemorrhagic effect (it is made up of haemotoxic and neurotoxic enzymes) which kills in 6 minutes. However, stored venom loses its potency after 17 years.