The natural environments require constant challenges to the animals that inhabit them: get food, avoid predators, find a partner and give birth to offspring. In nature, some species have developed strategies of attack, defense and reproduction surprising and unusual even for small animals. These include mainly insects and many small vertebrate. This army of unusual animals, aggressive in the fight for survival, is the star of the show " Predators of the microcosm ", to be held at the Museum of Natural History of Calci from 21 March to 21 June .