Indri (Indri Indri) songs can be heard from kilometers away and serve to defend a pair’s territory, advertise the position of the group within the territory, and maintain contact between group members even when far apart.  [Photo, recording, and caption by Meredith Lutz] Torti, V., Gamba, M., Rabemananjara, Z. H., & Giacoma, C. (2013). The…