Anguis fragilis
There are a lot of hiking trails, therefore the Ennert is a popular recreational area in the region of Bonn. There are a lot of springs in the Ennert. Some of them are not mapped. The names of the mapped ones are Alaunbach, Ankerbach, Pechsiefen, Holtorfer Bach, and Mühlenbach. Rare species like the fire salamander, the "Coronella austriaca", the great spotted woodpecker and the "Anguis fragilis" live in the forest or in the brooks and ponds. The Ennert is a nature reserve. In the northwestern part of Holzlar there are no forests and lakes and the land is used for agriculture.