Congolese side has been hunted out. The lake and swamp lagoons have been heavily fished and stocks depleted. The inaccessible Lusenga Plain National Park on the plateau east of the lake has been heavily depleted by poaching. Lake Bangweulu: the south-east of Luapula Province extends over the lake and into the swamps: see the wetlands ecosystem under Northern Province, above. Crocodiles are plentiful in the lake which is also home to hippo. The lake fish stocks have also been depleted. Eastern Province Most of the Luangwa Valley is protected by national parks or GMAs comprising one of the world's greatest wildlife areas: North Luangwa National Park, South Luangwa National Park, Luambe National Park and Lukusuzi National Parks, and Munyamadzi, Musalangu, Mukumgule, Lupande, Lumimba, Sandwe, Chisomo GMAs. Animals are plentiful and mostly well-protected, though poaching of elephant and rhinoceros has been a problem in the recent past. In the Luangwa Valley over 100,000 elephants were killed by poachers in a twelve-year period between 1973-1985. Zambia as a whole lost over 80% of its elephant population during that period. Copperbelt Province The most urban and industrial of Zambia's provinces lacks wildlife, except in the south-west where in flooded grassland habitats interspersed with miombo woodland, and except for birdlife, which is well represented near rivers and small lakes between towns. Chembe Bird Sanctuary west of Kitwe includes crocodiles and sitatunga as well as plentiful bird life. Central Province The north-east of this province reaches the margins of the Bangweulu wetlands - see Northern Province — and includes Kasanka National Park. The eastern end of the province reaches South Luangwa National Park but the latter's access is in Eastern Province, see above. Kafue National Park and the Mulobezi, Sichifulo, Mumbwa, Kasonso-Busanga, Lunga-Luswishi, Namwala, Bilili Springs, and Nkala GMAs are the second most important wildlife area in the country, so large that it is spread across two other provinces — Southern and North Western. The Busanga Swamps and plain in the north hosts the largest concentration of mammals and birds, while the Kafue River and lake of the Itezhi-Tezhi Dam are home to hippos, crocodiles and aquatic birds as well as being well stocked with fish. The northern part of the Kafue Flats and Blue Lagoon National Park are in Central Province, but are treated under Southern Province, below. The Lunsemfwa and Lukusashi River valleys and their northern escarpment, at the western end of the