wood fauna characterized for the wet soils, it hosts 250 species of fungi, many of which are listed on Serbian and international lists of rare or endangered species. It is the only known habitat in Serbia of Myriostoma coliforme. Location starts away from the lake. The fungi was discovered on the island in 1993, and in 2022 covered . Animals In terms of fauna, besides having numerous amphibians and 94 species of insects, Ada Ciganlija contains several mammal species, considered special due to the setting of the peninsula in an urban area. Foxes, hares and roe deer inhabit the peninsula. However, with environmentalists warning that the island's biocoenosis has been overly affected, a new population of 60 hares and 100 pheasants was introduced into the ecosystem in 2006. Bird species include more common lapwings, mallards, quails and pheasants. Common woodland and parkland birds during the nesting season include song thrush, great tit, blue tit, long-tailed tit, Eurasian nuthatch, European green woodpecker, great spotted woodpecker, golden oriole, nightingale, blackcap, common chaffinch, hooded crow, European magpie, common wood pigeon, feral pigeon, white wagtail and barn swallow. Unlike other rivers and wetlands in Belgrade, swans rarely visited the lake, including occasional black swans. Starting in September 2020, swans began to arrive at the lake, until several dozens flocked in total, and remained on Ada. The number of swans in Belgrade had been constantly growing since the 2010s, reaching some 600 birds by the winter of 2021. They are mostly mute swans and are quickly adapted: more and more of them becoming sedentary rather than migratory, accustoming to humans who regularly feed them, becoming popular among the residents, and turning into the mascots of the neighborhoods they inhabit. Ada is also the wintering ground for some threatened migratory birds, most notably the pygmy cormorant which winters in Belgrade in large numbers. Pygmy cormorant inhabited the Pančevački Rit marshland, just north of Belgrade, in the early 20th century, but after that area was drained and urbanized, they disappeared. Several hundreds of birds in the early 1990s began spending winters on the Malo Ratno Ostrvo, in the Danube. When their number exceeded 1,000, they resettled to three new locations: first at the willow grove on the Sava's bank (Belgrade Fair) and then to the area near the tip of Ada and the neighboring Mala Ciganlija. Their number rose every year to 6,750 in 2007/08, but since