Poisonous mushrooms are fungi that contain toxic compounds, making them harmful or deadly if ingested. Some well-known examples include the Amanita phalloides, commonly known as the death cap, and the Amanita muscaria, or fly agaric. These mushrooms can cause severe illness or even death, depending on the type and amount consumed. Identifying poisonous mushrooms can be challenging, as many edible varieties closely resemble toxic ones. It is essential to be cautious when foraging for mushrooms and to consult reliable guides or experts. Consuming wild mushrooms without proper knowledge can lead to serious health risks.