Mount Leuser National Park

Flora
Because of the great differences in altitude and the diversity in soil, mount Leuser National Park has an enormous wealth of plant species. About 8,500 different species grow in the beach, swamp, lowland, mountain and alpine woods of the park. In the beach and swamp forest we can find Casuarinas trees (Casuarinas sp.), Wild Nutmeg (Myristica sp.), Camphor (Drybalancops aromatica), Nibung palms, Rotan (Calamus sp.), Mangrove trees (Avicennia sp.) and Pandan (Pandanus sp.). Along the rivers grows Pometia pinnata. In the lowland forest, trees like Meranti (Shorea sp.), Keruing (Dipterocarpus sp.), Camphor and Damar (Hopea sp.) and several wild fruit trees like Durian (Durio zibethinus), Mango (Mangifera indica), Wild Banana, citrus fruit and wild jack fruit grow in abundance. In the mountain and alpine woods, several species of moss and wild flowers: Gentians, Primula's, Strawberry, herbs, and wild orchids are found. The Rafflesia Arnoldi (Rafflesia sp.) grows here also.

Fauna
About 700 different species of animals (320 birds, 176 mammals and 194 reptiles and amphibians) live in Mount Leuser National Park. In Ket lies lake Banko, the last place in North Sumatra where the Swamp Crocodile lives.
Mammals: Sumatran Rhinoceros (Dicerorhinus sumatrensis), Sumatran Elephant (Elephas maximus sumatrana), Otters (Lutra sp.), Wild Boar, Red Giant Flying Squirrel (Petaurista petaurista), Malayan Sun bear (Helarctos malayanus), Wild Dog (Cuon alpinus), Hog Badger (Arctonyx collaris), Lesser Mouse deer (Tragulus javanicus), Large Mouse deer (Tragulus napu), Barking Deer (Muntiacus muntjak), Sambar Deer (Cervus unicolor), Sumatran Tiger (Panthera tigris sumatrae), Clouded Leopard (Neofelis nebulosa), Flat- headed Cat (Prionailurus planiceps), Temminck's Golden Cat (Catopuma temminckii), Leopard Cat (Prionailurus bengalensis), Flying Lemur (Cynocephalus variegatus), Orangutans (Pongo pygmaeus abelii), Thomas's Leaf Monkey (Presbytis thomasi), Banded Leaf Monkey (Presbytis femoralis), Silvered Leaf Monkey (Trachypithecus cristatus), Long-tailed Macaque (Macaca fascicularis), Pig tailed Macaque (Macaca nemestrina), White-handed Gibbon (Hylobates lar), Siamang (Hylobates syndactylus), Sumatran Serow (Capricornis sumatraensis).
Reptiles: Swamp Crocodile (Crocodylus palustris), Estuarine Crocodile (Crocodylus porosus), Flying Frog (Rhacaphorus pardalis), Flying Snake (Crysopelea), Common Flying Lizard (Draco volans), Hawksbill Turtle (Eretmochelys imbricata), Leatherback Turtle (Dermochelys coriacea), Water Monitor (Varanus salvator).
Birds: Argus Pheasant (Argusianus argus), Asian Pied Hornbill (Anthracoceros albirostris), Rhinoceros Hornbill (Buceros rhinoceros), White-bellied Sea-eagle (Haliaeetus leucogaster), Blue-crowned Hanging Parrot (Loriculus galgulus), Osprey (Pandion haliaetus).