Park ranger
A park ranger, park warden, or forest ranger is a person entrusted with protecting and preserving parklands – national, state, provincial, or local parks. "Parks" may be broadly defined by some systems in this context, and include protected culturally or historically important built environments, and is not limited to the natural environment. Different countries use different names for the position. "Warden" is the favored term in Canada, Ireland, and the United Kingdom. Within the United States, the National Park Service refers to the position as a park ranger. The U.S. Forest Service refers to the position as a forest ranger. Other countries use the term "park warden" or "game warden" to describe this occupation. The profession includes a number of disciplines and specializations, and park rangers are often required to be proficient in more than one.
Garde champêtre
A garde champêtre () is the combination of a forest ranger, game warden and police officer in certain rural communes in France. 
Their job is to report to the local mayor. Many of these officers carry firearms (they commonly face poachers, many of whom are themselves armed) and other weapons. Mayors decide which weapons to provide them with, but "gardes champêtres" can purchase, retain and carry a much wider range of weapons than the urban police ("police municipale)" are allowed. They are not under the supervision of the Gendarmerie but under the mayor's, their employer.