an area of 76 ha and its unique character and history is reflected in the landscape architecture (pavilions, sculptures, bridges, water cascades) and vegetation (domestic and foreign species of trees and shrubs). The presence of peacocks, pheasants and squirrels at Łazienki attracts tourists and locals. The Wilanów Palace Parkland on the outskirts of Warsaw traces it history to the second half of the 17th century and covers an area of 43 ha. Its French-styled alleys corresponds to the ancient, Baroque forms of the palace. The Botanical Garden and the University Library rooftop garden host an extensive collection of rare domestic and foreign plants, while a palm house in the New Orangery displays plants of subtropics from all over the world. Mokotów Field (once a racetrack), Ujazdów Park and Skaryszewski Park are also located within the city borders. The oldest park in the Praga borough was established between 1865 and 1871. The flora of Warsaw may be considered very rich in species on city standards. This is mainly due to the location of Warsaw within the border region of several big floral regions comprising substantial proportions of close-to-wilderness areas (natural forests, wetlands along the Vistula) as well as arable land, meadows and forests. The nearby Kampinos Nature Reserve is the last remaining part of the Masovian Primeval Forest and is protected by law. The Kabaty Woods are by the southern city border and are visited by the residents of southern boroughs such as Ursynów. There are 13 natural reserves in the vicinity and just from Warsaw, the environment features a perfectly preserved ecosystem with a habitat of animals like the otter, beavers and hundreds of bird species. There are also several lakes in Warsaw – mainly the oxbow lakes at Czerniaków and Kamionek. The Warsaw Zoo covers an area of . There are about 5,000 animals representing nearly 500 species. Although officially created in 1928, it traces back its roots to 17th century private menageries, often open to the public. Demographics Demographically, Warsaw was the most diverse city in Poland, with significant numbers of foreign-born residents. In addition to the Polish majority, there was a large and thriving Jewish minority. According to the Imperial Census of 1897, out of the total population of 638,000, Jews constituted 219,000 (equivalent to 34%). Prior to the Second World War, Warsaw hosted the world's second largest Jewish population after New York – approximately 30 percent