Cerro Guanay is a tepui (table-top mountain) in southern Bolívar state of Venezuela. It extends up to approximately 2300 meters elevation.
Tepuis are isolated flat-topped sandstone mountains with a montane flora and fauna distinct from the surrounding lowlands. Cerro Guanay is home to many tepui-endemic species animals and plants. 19 species characteristic of the tepuis have been recorded there, including Chapman's bristle-tyrant ( Pogonotriccus chapmani), Tepui wren ( Troglodytes rufulus), Tepui brushfinch ( Atlapetes personatus), flutist wren ( Microcerculus ustulatus), buff-breasted sabrewing ( Campylopterus duidae), olive manakin ( Xenopipo uniformis), Tepui antpitta ( Myrmothera simplex), golden-tufted grackle ( Macroagelaius imthurni), velvet-browed brilliant ( Heliodoxa xanthogonys), Tepui swift ( Streptoprocne phelpsi), black-fronted tyrannulet ( Phylloscartes nigrifrons), scaled flowerpiercer ( Diglossa duidae), white-faced whitestart ( Myioborus albifacies), scarlet-horned manakin ( Ceratopipra cornuta), and peacock coquette ( Lophornis pavoninus). Endemic plants include Bonnetia crassa, Kunhardtia rhodantha, Brocchinia melanacra, and Tepuipappus esposi, as well as species of Eriocaulaceae, Cyperaceae, and Xyridaceae.[
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The Venezuelan government designated Cerro Guanay a natural monument in 1990, which protects an area of 1348.09 km2.[
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