Iguana GuideChemical information
Iguanas do not investigate the world only through sight. Tongue-flicking can collect molecules that are processed by the vomeronasal or Jacobson's system.
Why they lick a person
Licking a hand or arm can be exploratory. It should not automatically be translated into affection, hunger or aggression.
Combine senses
Visual and chemical information work together. An iguana can inspect movement and posture visually while also sampling scent cues.
Useful interpretation
If licking occurs during calm exploration, it is different from a sequence that includes rigid posture, defensive display or attempts to escape.
Keep exploring
Use the related guides to connect this topic with species, behavior, anatomy and habitat rather than treating it as an isolated fact.
Sources & further reading
Key factual claims on this page were checked against these references.