National parks, reserves, 1 conservation area, and 3 marine parks. Spread over a zone of in excess of 42,000 square kilometres (16,000 sq. mi) and shaping around 38% of the nation's area. Tanzania has 21 national parks, plus a variety of game and forest reserves, including the Ngorongoro Conservation Area, however there so many people who live in Ngorongoro and try to affect the environment. In western Tanzania, Gombe Stream National Park is the site of Jane Goodall's ongoing study of chimpanzee behaviour, which started in 1960. Tanzania is highly biodiverse and contains a wide variety of animal habitats. On Tanzania's Serengeti plain, white-bearded wildebeest (Connochaetes taurinus mearnsi), other bovids and zebra participate in a large-scale annual migration. Tanzania is home to about 130 amphibian and over 275 reptile species, many of them strictly endemic and included in the International Union for Conservation of Nature's Red Lists of countries. Tanzania has the largest lion population in the world. Tanzania had a 2019 Forest Landscape Integrity Index mean score of 7.13/10, ranking it 54th globally out of 172 countries. Politics Government Tanzania is a one-party dominant state with the Chama Cha Mapinduzi (CCM) party in power. From its formation until 1992, it was the only legally permitted party in the country. This changed on 1 July 1992, when the constitution was amended. It has held power since independence in 1961, and is the longest-serving ruling party in Africa. John Magufuli won the October 2015 presidential election and secured a two-thirds majority in parliament. The main opposition party in Tanzania since multiparty politics in 1992 is called Chama cha Demokrasia na Maendeleo (Chadema) (Swahili for "Party for Democracy and Progress"). The leader of Chadema party is Freeman Mbowe. In Zanzibar, the country's semi-autonomous state, The Alliance for Change and Transparency-Wazalendois (ACT-Wazalendo) is considered the main opposition political party. The constitution of Zanzibar requires the party that comes in second in the polls to join a coalition with the winning party. ACT-Wazalendo joined a coalition government with the islands' ruling party Chama Cha Mapinduzi in December 2020 after Zanzibar disputed elections. In November 2020, Magufuli once again was declared the winner for his second term as president. Election fraud was suspected. The national electoral commission announced that Magufuli received 84%, or about 12.5 million votes and the top opposition candidate, Tundu Lissu received 13%, about 1.9 million votes. In March 2021, it was