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The Flores Hawk Eagle Nisaetus floris belongs to the Hawk Eagle family and being endemic to Nusa Tenggara Islands. The species has been qualified as Critically Endangered by IUCN (2005) under criteria C1 (population <250 individuals and continuing to decline 10% per 10 years or three generations). This paper presents results of study during dry season (July and September 2011) with the main objective is to collect data of distribution, population, habitats and ecological aspect of the species inhabiting conservation areas and other protected areas in and around Lombok Island, West Nusa Tenggara. The total population found during the survey were 44 individuals (22 pairs and 2 floaters) on 18 locations. The Flores Hawk Eagle commonly occurs at elevation of >900 m about sea level (sub-Montana forest zone) while lower
elevation of <900 m a.s.l., is more dominated by Brahminy Kite Haliastus indus. Among the most serious threat to the survival of the eagle are land use change, shifting cultivation, hunting practice by local community, and collection of firewood and wood material for building and forest clearance agriculture.
Keywords: Flores Hawk Eagle, Nisaetus floris, population, distribution, habitat, threat
