Brazil-nut poison frogs spend their days scouring deep leaf litter across the lowland Amazon basin for tiny arthropods. Males are attentive parents that transport hatched tadpoles on their backs directly to water-filled capsules of fallen Brazil nuts or tree holes. Their glossy black bodies and contrasting yellow or orange leg flashes serve as a bold warning signal to would-be predators.
ThreatsDeforestation, illegal pet trade collection, and habitat fragmentation
HabitatsPrimary lowland tropical rainforest floor and leaf litter
Life span5–10 years
Classification
OrderAnura
FamilyDendrobatidae
GenusAdelphobates
SpeciesAdelphobates castaneoticus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskHigh
Low
Moderate
High
Very high
Why interaction risk is high
Skin secretes defensive alkaloid toxins; do not handle and never touch eyes or mouth after contact.
Why it is dangerous
Produces lipophilic alkaloid toxins in cutaneous glands that can cause intense irritation, numbness, and toxicity if absorbed through mucous membranes or cuts.
How to recognize a risky encounter
Look for a smooth, jet-black body sharply contrasted with vivid yellow or orange-red spots at the arm and leg joints.
What to do
Observe exclusively from a distance and wash hands immediately if accidental contact occurs.
Responsible observation
Observation: Watch quietly near fallen fruit husks and moist leaf litter during humid mornings.
Handling: Do not pick up or touch bare-handed, as skin toxins can irritate mucous membranes.
