A new study blames the domestic pet industry for threatening the survival of 13 bird species in Indonesia.

The study, which focuses on birds endemic to Java, Bali, Sumatra and Kalimantan, includes the iconic Javan Hawk-Eagle (Nisaetus bartelsi), of which just 300-500 are thought to remain in the wild.

Some 30-40 of the endangered hawks, "conceivably equivalent to the species' annual (breeding) output," are captured by traders each year, the authors n