It was microbes that opened up many possibilities for animals. The unusual and unique way of life of many species of animals without bacteria would be simply impossible! Moreover, if the animals have similar habits, then their microbiomas are also similar. Skeptics may think that this could be due to something else, for example, to kinship ties. But no, all mammals that have developed independently for one hundred million years, and fed on ants or termites, have almost the same communities of intestinal bacteria. Our invisible friends also congratulate you on World Wildlife Day!