The number of this rare bird flocking to the park is expected to increase in the coming time due to the area's abundant food sources and well preserved environment, said Huynh The Phien, director of the national park.

However, he said, prolonged drought has put more than 3,000 ha of forests in the park under high risk of fires, possibly threatening the habitat of the bird.

With thousands of hectares of cajeputs and swaps, the park is home to some 120 species of fresh-water fish, 40 amphibian-reptiles and 200 bird species, including 16 rare species.