 The wild fauna that appears in this town are the rabbits and hares and in minor measured badgers and weasels.In occasions can us find with foxes or some wild boars, which is very abundant in the near Sierra de Moncalvillo.Due to its being situated near of the capital, Entrena has gone increasing its population slowly, in comparison with other next towns, but getting further away of most of the villages of the community, further, that have lost population.