Monts de Gueret Animal Park
The wolf pack howls on average for 85 seconds. It is usually started by a single wolf, after which other wolves may join in. The pack leader, the alpha wolf, usually uses a lower-pitched howl and howls more frequently than wolves standing on the lower rungs of the pack's hierarchy. Although some functions of the howling are still unknown by scientists, they believe that wolves may howl to scare off other wolf packs from their territory and to gather their own pack, as wolves possess perfect hearing and their howling can be heard for up to in the forest and in open space. Researchers have found a relationship between the number of times a wolf howls and the strength of their relationship with other pack members. According to Friederike Range, co-director of the University of Vienna's Wolf Science Center, "the strength of the relationship between wolves predicted how many times a wolf howled."
OR-7
By 2014, OR-7 had settled in the Rogue River watershed in the southern Cascade Range east of Medford, Oregon, with a mate. It is not known when the two wolves met, but DNA tests of fecal samples showed that she is related to wolves in two of the eight packs in northeastern Oregon. In early 2015, officials designated the two adult wolves and their offspring as the "Rogue Pack", the first wolf pack in western Oregon and the state's ninth overall since wolves returned to Oregon from Idaho in the 1990s. The batteries in OR-7's tracking collar expired in October 2015, and monitoring the pack since then has depended on trail cameras and live sightings. Meanwhile, other wolves have migrated into the mountainous cross-border region, and relatives of OR–7 have formed two packs in northern California.