Ripa Bianca Nature Reserve covers an area of 310,86 hectares of protected land. It was established in 1977; Jesi is the town included there. The area of the reserve is situated along the river Esino, halfway between the Rossa Gorge and the Adriatic Sea; it features areas of gravelly shore, ponds and a small artificial basin. The most typical trees are: the willow, both red and white, and the poplar. It is an important site for wintering, nesting and summering of many interesting species of birds such as the cavaliere of Italy. Here is also the largest number of Marche ‘s herons, with more than 100 nests of night herons, gray herons and egrets. The sparrow hawk, the owl, and the lapwing are also widespread.