The way in which cephalopods and chameleons communicate is colour-based. More study is needed on how much information is passed on. The physiology, the status and the drive can be explained now by rate change and colour brightness in different parts of the anatomy
What to do? Our governments insist we should use new forms of fossil fuels to maintain the energy capacity we have always had. But how many in those governments have any knowledge of the chemistry, the environmental science or even the health effects. Basically, none!
The empty wildernesses are filling up with corn monoculture once again. The US record for conservation has been good recently, with iconic species saved, but with low human populations, the wolf, the bear and the tiny members of food webs should be able to rest easy in large stretches of their habitat with great National Parks set aside exclusively for them.