This report is an addendum to the Main Environmental and Social Impact Assessment (ESIA) for the Western Range DSO Iron Ore Project (Phase 1) proposed by ArcelorMittal Liberia. In order to fill gaps identified in the baseline surveys for the ESIA, additional zoological surveys were commissioned by ArcelorMittal Liberia in 2010/2011. This report summarizes the principal findings of those field surveys (in Section 2), and the recommendations arising from them (in Section 3). The specialist reports themselves are provided as Annexes 1