This is often due to logging operations and the associated pollution and silting of rivers. In Australia, much of the Irrawaddy’s territory remains relatively uninhabited by humans.
दक्षिणपूर्वी एशिया के कुछ भागों में उनकी संख्या घट रही है, और दूसरे भागों में वे अब बिलकुल नहीं मिलतीं ।