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 were found to meet the criteria. As more streams were assessed, the number of Class A Wild Trout Waters grew rapidly. By 2005, there were 436 Class A Wild Trout Waters, totaling . By the end of 2008, there were 487 such stream sections, which together included of streams. By 2014, there were 510 Class A Wild Trout Waters, comprising of streams. In the 2010s, the fact that the Pennsylvania Fish and Boat Commission was considering adding seven urban streams to its list of Class A Wild Trout Watersthus ending stocking therecaused some criticism by anglers who believed that this