While "poison immunity" is a broad term, it's more accurate to discuss venom resistance or tolerance. Several animals have evolved resistance to specific toxins. Determining which animal has complete poison immunity is difficult, as it depends on the type of poison. However, we can discuss animals with notable venom resistance.
Animals with Venom Resistance:
The question references several animals with venom resistance, rather than complete immunity.
- Mongooses: Known for their ability to fight and survive venomous snake bites. They have acetylcholine receptors that don't bind snake venom neurotoxins as readily.
- Honey Badgers: Their thick skin and acetylcholine receptors also contribute to venom resistance.
- Hedgehogs: Similar to mongooses and honey badgers, hedgehogs exhibit resistance to certain venoms.
- Pigs: Possess venom-resistant qualities.
- Snakes: Many snake species are immune to their own venom and sometimes the venom of other snakes.
Golden Poison Frog:
The reference highlights that the golden poison frog is deadly to almost all animals, suggesting most animals lack immunity to its poison. The reference does not however, specify which if any animal has an immunity to it.
Important Considerations:
- Type of Poison/Venom: An animal resistant to one type of venom might be highly susceptible to another.
- Level of Resistance: Resistance isn't always immunity; it can mean tolerance to a certain dosage or a quicker recovery.
Therefore, identifying a single animal with complete "poison immunity" across all toxins is not possible based on the provided reference. Several species possess varying degrees of resistance to specific venoms.
