Babirusa actually pierce the flesh in the snout. All species of babirusa are listed as threatened by the International Union for Conservation of Nature (IUCN), shown on their Red List since at least 2010 and current in 2017. The genus is monotypic within the subfamily Babyrousinae, or alternatively considered to form a tribe, Babyrousini, of the subfamily Suinae. To date, only one fossil skull has been found to suggest a larger ancestor. All members of the genus were considered part of a single species until recently, the babirusa or pig-deer, "B. babyrussa", but following the split into several species, this scientific
Class A Wild Trout Waters the minimum is , and for brown trout alone, the minimum is . The modern stream classification system of the Pennsylvania Fish and Boat Commission, including Class A Wild Trout Waters, was developed with Operation Future, which marked a transition from recreation-based management to resource-based management, in 1983. Following statewide stream surveys in the late 1970s and early 1980s, the Pennsylvania Fish and Boat Commission created a set of biomass standards for trout streams in the state. The first streams were designated as Class A Wild Trout Waters in 1983. At that time, 138 stream sections, totaling nearly of streams,