Sinharaja Forest Reserve is Sri Lanka’s primary tropical rainforest and a UNESCO World Heritage Site of global ecological significance. Over 60% of Sri Lanka’s endemic tree species grow here, along with more than 150 bird species, including nearly all of the island’s endemic birds, many of which move together in large mixed-species foraging flocks. Walking through Sinharaja’s dense, dripping green interior is an immersive experience – the air is alive with birdsong, the ground is carpeted with moss and ferns and rare endemic butterflies and amphibians emerge at every turn.