The tongue flick can also be a good warning sign that it's going to bite as well. It's very common to see an iguana that is exploring a new area of the house or habitat, to have its tongue flicking anything and everything. When your iguana is out exploring, be very careful when you see it in full tongue flicking mode and always make sure you iguana-proof your home to prevent any problems. Sneezing or snorting. Although sneezing and snorting isn't really a form of body language, it is a very common characteristic of iguanas.
Iguanas sneeze or snort to rid their bodies of certain salts.
Iguanas do not catch colds from viruses, but they can get respiratory infections from bacteria. Sneezing and snorting isn't usually a sign of respiratory infection. Sneezing and snorting is quite normal, but if the iguana snorts far too often, it may be a sign that its diet needs adjustment. This is a very obvious form of body language. Whipping its tail is usually the first weapon an iguana will use to protect itself.