Asian black-spined toad (Duttaphrynus melanostictus) is also called Asian common toad, black-spectacled toad, or just Asian toad. It is probably the most common amphibian in Hong Kong.
It is also widely distributed throughout Asia from Pakistan, Nepal, Bangladesh, India, Sri Lanka, Myanmar, Thailand, Laos, Vietnam, Cambodia, southern China, Taiwan, and Macau to Malaysia, Singapore, and the Indonesian islands of Sumatra, Java, Borneo, Anambas and Natuna Islands.
It has been accidentally introduced to many other parts of the world as an invasive species such Bali in 1958, Sulawesi in 1974, then subsequently to Ambon, Lombok, Sumba, Sumbawa, Timor and Indonesian New Guinea, Australia in 2000, and Madagascar in 2011.
See more of my encounters with Hong Kong Wildlife.