Eco Tourism Laos has an excellent summation of all the protected areas in Laos.
"The Lao system of 20 National Protected Areas (NPAs) covers nearly 14% of the country and is recognized as one of the best designed NPA systems in the world.
Laos' NPAs offer a range of ecotourism attractions among their large tracts of tropical monsoon forest, diverse wildlife populations, bizarre karst limestone formations and dozens of ethnic minority groups.
Although most of Laos' NPAs are remote and difficult to reach, they still offer several ecotourism activities such as trekking, kayaking, bird watching and camping that present visitors with keen insight into the country’s magnificent natural and cultural diversity."
Phou Daen Din
Location: Pongsali Province. 2,220 sq. km. Key Species: Elephants, gibbons and a high density of lesser fish eagles.
Location: Luang Namtha Province. 2,224 sq km. Key Species: Mammals of significance are clouded leopard, leopard, and tiger. There are small populations of gaur, Asian elephant, and a possibly unique muntjac species.
Location: Houaphan Province. 1,915.sq km. Key Species: Clouded leopard, tiger, and leopard. All large cats endemic to Indochina are reported to exist in this NPA.
Location: Luang Prabang & Houapahn. 1,465 sq km. Key Species: Clouded leopard, tiger, and leopard. All large cats endemic to Indochina are reported to exist.
Location: Houapahn. 1,734 sq km. Key Species: Tiger, muntjac and guar. Numerous gibbon species, small elephant population, marbled cat, high densities of grey peacock pheasant, Blyth’s kingfisher, and beautiful nuthatch. Two bird species not recorded in any other NPA are brown-throated tree-creeper and yellow-bellied weasel.
Location: Sayabouli 1,912 sq km. Key Species: Substantial elephant population estimated at 350 wild animals, Lar gibbon, gaur, tiger, dhole, serow, silvered langur and Asiatic black bear. There is evidence that Sumatran rhinos may still exist here.
Location: Vientiane, 1,525 sq km. Key Species: Gibbon, inornate squirrel, elephant.
Phou Khao Khouay
Location: Vientiane. 2,000 sq km. Key Species: White-cheeked gibbons, elephants and green peafowl.
Location: Bolikhamxai. 1,690 sq km. Key Species: Elephant, gaur, giant muntjac, gibbons, sooty babbler and rufous-throated fulvetta, river lapwing, wreathed and great hornbills and large otters.
Phou Hin Boun
Location: Khammouane. 1,690 sq km. Key Species: Francois’ langur sub-species called laotum, Assamese macaques and gibbons, Asian elephant, gaur, tiger, serow, 43 species of bat, sooty babbler and limestone leaf warbler.
Location: Khammouane. 3,710 sq km. Key Species: Three of the last five large mammals to be discovered or rediscovered world-wide occured in Nakai. The most distinct of these remarkable discoveries is the Saola. Other newly discovered species are a small dark muntjac and Giant Muntjac The Indochinese warty pig was recently rediscovered in 1997 after being considered extinct. At least nine species of primates occur including pygmy loris, douc langur, Francois’ langur and white-cheeked gibbon.
Location: Khammouane. 895 sq km. Key Species: Douc and Francois’s langur, giant muntjac, fruit bat, harlequin bat, greatevening bat, wreathed and great hornbills and the sooty babbler.
Phou Xang Hae
Location: Savanakhet, 1,060 sq km. Key Species: Douc and Francois’s langur, elephants, tigers and other big cats, bears and the bar-bellied pitta.
Dong Phou Vieng
Location: Savanakhet, 1,970 sq km. Key Species: Douc and Francois’s langur, elephants, cattle, tigers, pangolin, Oriental pied hornbill, great hornbill, wreathed hornbill and the white-rumped and red-headed vultures.
Xe Bang Nouan
Location: Salavan & Savanakhet. 1,260 sq km. Key Species: No detailed survey information available.
Location: Salavan & Sekong. 1,335 sq km. Key Species: Two species of bears, gaur, dhole, serow, large antlered muntjac and tigers.
Phong Xieng Thong
Location: Salavan & Champasak, 1,200 sq km. Key Species: Green peafowl, banteng and leopard.
Location: Attapeu, 1,975 sq km. Key Species: Douc langur and buff-cheeked gibbon,fishing cat Asiatic golden cat, clouded leopard and tiger. Gaur, Trong Song muntjac and small populations of Asian elephants. There are a total of 280 bird species including Siamese fireback, crested argus and the woolly-necked stork & rufous-winged buzzard.
Dong Houa Sao
Location: Champasak, 1,100 sq km. Key Species: Elephant, grey-faced tit-babbler, yellow-cheeked gibbon.
Location: Champasak and Attapeu, 2,400 sq km. Key Species: Tiger, banteng, irrawaddy dolphin, Asian elephant, gaur, sun bear, Asiatic black bear, yellow-checked crested gibbon. The Xe Pian-Dong Hua Sao NPA gibbon population is of major global conservation significance. Xe Pian has the highest number of birds recorded for any NPA. Seven of these species have not been recorded in any other protected area in Laos. Important species include the giant ibis, black ibis, sarus crane, white-winged duck and the white rumped, long billed and red headed vulture.
Source: Eco Tourism Laos