Pilibhit Forest Division is a part of Terai Arc Landscape and according to the recent classification proposed by Wikramanayake et al. (1999, 2002) that takes into consideration both biogeography and conservation values, the landscape corresponds to three ecoregions –
(i) Upper Genetic Plains moist deciduous forest,
(ii) Terai-Duar savanna and grasslands and
(iii) Himalayan subtropical broad leaf forest.
The vegetation in the area is a mosaic of dry and moist deciduous forests, scrub savannah and productive alluvial grasslands, which harbour a rich fauna including several endemic and globally endangered species. The Terai forests and grasslands constitute habitat for over 127 animals, 556 bird species and 2,100 flowering plants. They are also home to around 6 million people who depend on them for their livelihoods
Prominent among such species are the Royal Bengal Tiger (Panthera tigris), Asian elephant (Elephas maximus), one-horned rhinoceros (Rhinoceros unicornis) and swamp deer (Cervus duvaucelli). Other endemic and obligate species found in this landscape are the hog deer (Axis porcinus), hispid hare (Caprolagus hispidus), Bengal florican (Houbaropsis bengalensis) and swamp francolin (Francolinus gularis). Many of these species, surviving in small populations, have their last home in this landscape (Johnsingh et al. 2004). The Asian elephant and one-horned rhinoceros are migratory species in the division. The Dudhwa tigers are distributed in one major and three smaller populations. Major population is constituted by Dudhwa reserve which includes Dudhwa National Park, Kishenpur and Katarniaghat wildlife sanctuaries, Pilibhit forests and north and south Kheri forests. Smaller tiger populations are present in Bijnor forests in west and Suhelwa and Sohagibarwa wildlife sanctuaries in east. According to a study by Wildlife Institute of India (WII), the Dudhwa-Pilibhit tiger population has high conservation value since it is the only population having the ecological and behavioural adaptations of the tiger unique to the Tarai region.
Sal, Khair, Sissoo, Ber, Kuthber, Bel, Dhak, Semal, Khingan, Kharpat, Rohini, Bakli, Aonla, Harad, Baheda, Bakayan, Asna and more faicus species
Mammals: Tiger, Leopard, Elephant, Cheetal , Sambar , Hog Deer, Barking Deer , Wildboar Langoor And Rhesus Monkey.
Birds : Peacock, Jungle Fowl, Partridges, Crow, Vulture, Parakeets, Laughing Thrush, Orioles, King Fishers, Drongo, Doves, Woodpeckers, Ducks, Teals, Storks, Cormorants and Seagulls .
Reptile : Indian Marsh Crocodiles Or Mugger , Gharials , King Cobra, Common Krait , Cobra, Russel , Python and Monitor Lizard .
Pisces : Gangetic dolphins, Cat Fish , Rohu , Chilwa, Goonch, Mangur, Snake Head