If you want to explore the rich biodiversity of forests, there is no better place than Tai Po Kau Nature Trail. Located inside Tai Po Kau Nature Reserve, the trail is a home to more than a hundred species of trees, and many of which are native to Hong Kong, hikers can find Fragrant Litsea easily along the trail. The oil extraction and the liquid in its fruits can be used to make a fragrance and insect repellent respectively. Another example of native species is Giant Bean, which displays characteristics of both trees and vines. It attaches to a tree before extending to another tree through the air like jumper cables. There are many of them in the forests but it is difficult to find their origins. The trail is surrounded by luxuriant secondary forests, with many Chestnut Oak. They were cut down for making farming tools and now grow freely in the forests. The fallen leaves from them covered the stone-paved path, as if they are trying to take over the earth by removing all traces of human existence. The unspoiled natural environment houses a variety of birds in all seasons. Some common species all the year round include Chestnut Bulbul, Silver-eared Mesia, and Grey-chinned Minivet. In winter, you could meet Grey-backed Thrushes and wagtails. In spring and summer, owls, cuckoos, and Hainan Blue Flycatcher are here for you to discover in the forest.