Ilgaz Mountains, especially the northern slopes, are covered with dense forestry. The popular name of the forestry around Ilgaz Mountains is sea of trees (). Some of the wild animals living in the wooded ranges are red deer, roe deer, fallow deer, wild boar, brown bear, gray wolf, European jackal, chamois and red fox. In 1996, a new insect species was discovered in Ilgaz Mountain ecology and in 2010 it was named as Merodon Ilgazense.