There is no specific collective noun for chameleons. Thecollective noun for lizards is 'a lounge of lizards', which couldbe used for 'a lounge of chameleons'. If that doesn't suit thesituation, any suitable noun can serve as the collective noun.By looking at collective nouns for other species such as "ALounge of Lizards" and "A Mess of Iguanas", one finds that theseparticular nouns do not categorize the species on any scientificbasis, rather they make generic connections based on observedbehavioral patterns. Therefore logical extrapolation of this wouldlead to a collective noun based on the Chameleons ability to changethe coloration of its skin cells. Nouns such as concealment,camouflage, illusion or ambuscade could be used when describing acollection of Chameleons. For Example: "A camouflage of Chameleons"or "An Illusion of Chameleons" would be perfectly acceptable.