Fauna
Amphibian

Sonoran Desert Toad

Incilius alvarius

Also known as Colorado River Toad

Emerging from subterranean retreats during summer monsoon rains, Sonoran Desert toads are North America's largest native toad. Large parotoid glands behind their eyes secrete powerful defensive toxins capable of deterring most mammalian predators. Females lay long gelatinous strings containing thousands of black eggs in temporary desert pools, where tadpoles rapidly mature before water evaporates.

NocturnalAmphibianDesert
Sonoran Desert Toad reference1 / 6
(c) Melanie J. Davis, some rights reserved (CC BY) · cc-by
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyBeetles, Scorpions, Small rodents
Predators
  • Raccoons
  • Coatis
  • Garter snakes
ThreatsHabitat loss, road mortality, over-collection, and extreme drought
HabitatsArid deserts, desert scrub, grasslands, and lower mountain canyons
Life span10–20 years
Classification
  1. FamilyBufonidae
  2. SpeciesIncilius alvarius
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is high
Skin secretions are highly toxic to pets and humans; keep dogs away and avoid handling.
Why it is dangerous
Secretes potent cardiotoxins and tryptamines from parotoid glands that cause cardiac arrest or seizures if ingested by pets.
How to recognize a risky encounter
Recognized by its massive olive-green body, smooth skin, large parotoid glands behind the eyes, and white warts near the jaw.
What to do
Do not touch; keep pets leashed on humid summer nights and seek immediate veterinary care if a dog contacts one.
Responsible observation
  • Observation: Watch active adults on warm summer nights following monsoon rains.
  • Pet Safety: Keep dogs leashed near desert pools to prevent fatal ingestion of toad toxins.
  • Handling Precautions: Never handle wild individuals, as secretions cause severe mucosal irritation.
Related species
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