A relative humiditiy of 50-70% is adequate for most species but some species have more specific requirements. Desert species require 20-30% while a higher humidity is required for rainforest species (e.g. emerald tree boa). The humidity can be increased by spraying the environment and by adding water-retaining substances such as moss, peat or vermiculite. | A relative humiditiy of 50-70% is adequate for most species but some species have more specific requirements. Desert species require 20-30% while a higher humidity is required for rainforest species (e.g. emerald tree boa). The humidity can be increased by spraying the environment and by adding water-retaining substances such as moss, peat or vermiculite. |