Mount Tomanivi, previously named Mount Victoria and also known as Tomaniivi, is an extinct volcano located in the northern highlands of Viti Levu. At 1324 m, Mount Tomanivi is the highest mountain in Fiji. A trail leads to the summit of Tomanivi from the village of Navai. The main river systems, the Rewa, Navua, Sigatoka, and Ba, all have their headwaters in the central mountain area. Tomanivi contains a significant proportion of the highest-altitude montane forest in Fiji. This is an important habitat for birds and other biodiversity. A 17500 ha area covering the slopes of Tomanivi is the Greater Tomaniivi Important Bird Area. The Important Bird Area combines Tomaniivi Nature Reserve and Wabu Forest Reserve with other contiguous forests to form a single forest block. It is seen as the best hope for the critically endangered red-throated lorikeet surviving anywhere in the world. It also supports populations of endangered long-legged warblers, and the vulnerable shy ground-dove and pink-billed parrotfinch.