Taman Nasional Meru Betiri duwé kéwan kang langka cacahé kurang luwih ana 29 warna "mamalia", lan 180 warna manuk. Kéwan-kéwan mau kaya ta banthèng ("Bos javanicus javanicus"), kethèk buntut dawa ("Macaca fascicularis"), Harimau Jawa ("Panthera tigris sondaicus"), macan tutul ("Panthera pardus melas"), ajag ("Cuon alpinus javanicus"), kucing alas ("Prionailurus bengalensis javanensis"), rusa ("Cervus timorensis russa"), ("Cervus unicolor"), bajing miber buntut abang ("Iomys horsfieldii"), merak ("Pavo muticus"), penyu belimbing ("Dermochelys coriacea"), penyu sisik ("Eretmochelys imbricata"), penyu ijo ("Chelonia mydas"), lan penyu lekang/ridel ("Lepidochelys olivacea"), "Accipiter trivirgatus", "Falco moluccensis", "Hieraaetus kienerii", "Otus lempiji", "Glaucidium castanopterum", "garudha Spizaetus alboniger".