Seed when castor beans have been ingested by animals. In addition, seeds containing amygdalin—apple, apricot, bitter almond, peach, plum, cherry, quince, and others—when consumed in sufficient amounts, may cause cyanide poisoning. Other seeds that contain poisons include annona, cotton, custard apple, datura, uncooked durian, golden chain, horse-chestnut, larkspur, locoweed, lychee, nectarine, rambutan, rosary pea, sour sop, sugar apple, wisteria, and yew. The seeds of the strychnine tree are also poisonous, containing the poison strychnine. The seeds of many legumes, including the common bean ("Phaseolus vulgaris"), contain proteins called lectins which can cause gastric distress if the beans are eaten without cooking.
Poisonous amphibian Poisonous amphibian Poisonous amphibians are amphibians that produce toxins to defend themselves from predators. Except certain salamandrid salamanders that can extrude sharp venom-tipped ribs, amphibians are not known to actively inject venom. Most toxic amphibians are instead known to be poisonous to touch or eat. Amphibians usually sequester toxins from animals and plants on which they feed, commonly from poisonous insects or poisonous plants. One example of this is the well-known poison dart frog. They get a deadly chemical called lipophilic alkaloid from consuming a poisonous food in the rainforest. They are immune to the poison and they secrete it