Skip to content
Fly agaric (Amanita muscaria), photo
Photo
Poisonous

Fly agaricAmanita muscaria

Fly amanita

Amanita muscaria is a toxic mushroom containing ibotenic acid and muscimol. It grows in Mexican forests and is recognized by its often red, wart-covered cap.[1][3][6]

Poisonous. Causes poisoning. Never eat a wild mushroom identified only from photos.

  • Season in Mexico
  • HabitatMountain forests
  • FamilyAmanitaceae

What happens if someone eats Fly agaric?

Did someone eat a wild mushroom and feel sick? Call emergency services and bring a sample of the mushroom.

Toxins
Ibotenic acid: A neuroactive compound involved in poisoning. Muscimol: A neuroactive compound involved in poisoning, with effects on the central nervous system.
When symptoms start
The first symptoms typically appear between 30 minutes and 2-3 hours after ingestion.
What to do
If you or someone else ate this mushroom, call a poison center or emergency services immediately. Do not wait for symptoms. After requesting help, keep a mushroom sample and bring it to assist identification.
[6][7][8][9][10]

How do you identify Fly agaric?

Cap
In the American form flavivolvata, it measures 5-25 cm. Deep to bright red, sometimes fading to pale orange or yellow.[3]
Warts
Small and cottony; in flavivolvata they begin yellow and quickly turn white.[3]
Gills
White, closely spaced, free from the stem or narrowly attached.[3]
Stem
In flavivolvata, it measures 5-18 cm long and 1-3 cm thick. White, with a swollen base.[3]
Ring and base
A high, hanging ring. Veil remnants form concentric bands on the bulb or lower stem.[3]
Flesh
White; its color stays unchanged when cut.[3]
Spore print
White.[3]

Can you eat Fly agaric?

It is toxic. Avoid eating it, and have any wild mushroom you intend to eat identified by an expert.[6][9]

Where and when does Fly agaric grow?

In Mexico, it grows on soil in Pinus, Quercus and Abies forests and in mountain cloud forests. It forms mycorrhizal associations with trees.[1][3]

The consulted sources do not specify a monthly fruiting season for Mexico.[1]

UNAM records these Mexican entities using these names. It also reports occurrences in Europe, Asia, Africa, Australia, New Zealand and the Americas.[1]

Baja CaliforniaBCSonoraSONChihuahuaCHHCoahuilaCOANuevo LeónNLBaja California SurBCSSinaloaSINDurangoDURZacatecasZACSan Luis PotosíSLPTamaulipasTAMNayaritNAYJaliscoJALAguascalientesAGSGuanajuatoGTOQuerétaroQROHidalgoHGOColimaCOLMichoacánMICEstado de MéxicoMEXCiudad de MéxicoCDMXTlaxcalaTLXVeracruzVERYucatánYUCGuerreroGROMorelosMORPueblaPUETabascoTABCampecheCAMQuintana RooROOOaxacaOAXChiapasCHP
States with records (18/32): Baja California, Chihuahua, Coahuila, Nuevo León, Sinaloa, Durango, Zacatecas, San Luis Potosí, Jalisco, Hidalgo, Michoacán, Estado de México, Ciudad de México, Tlaxcala, Veracruz, Puebla, Oaxaca, Chiapas

See the mushroom map

About the name

Amanita muscaria encompasses a genetically diverse group with infraspecific names. This page's identification measurements refer to flavivolvata, the American form described by MushroomExpert.[3]

Fun facts

  • In Chiapas, a local belief holds that Amanita muscaria appears where lightning strikes. UNAM documents this belief.[1]
  • The name muscaria comes from the Latin musca, meaning fly, and is linked to its historical use to kill flies.[12]

Frequently asked questions

Sources

  1. Hongos Tóxicos de México: Amanita muscaria
  2. Hongo matamoscas (Amanita muscaria)
  3. Amanita muscaria var. flavivolvata (MushroomExpert.Com)
  4. Amanita rubescens (MushroomExpert.Com)
  5. Mushroom Poisoning
  6. Acute Amanita muscaria Toxicity: A Literature Review and Two Case Reports in Elderly Spouses Following Home Preparation
  7. Mushroom Poisoning Syndromes
  8. Toxicology — Mushroom Poisonings
  9. Mushroom poisoning: Don't invite "the death angel" to dinner
  10. Need immediate assistance?
  11. Artificial Intelligence-Assisted Optimization of Amanita caesarea Extracts for Bioactive Compounds and Functional Food Applications
  12. Amanita muscaria

Written with AI help from the cited sources. A second model checked every fact against those sources and removed what they did not support.

Image credits

Photos are under free licenses (CC0, CC BY or CC BY-SA).

Related mushrooms