According to a study conducted by a group of ornithologists from Chitwan and Kosi Wildlife Reserve, migratory birds flocking to Chitwan National Park in winter have increased considerably. There are 564 species of birds found in the national park out of which 20 are on the endangered list. The Bristle Grass Bird which is on the verge of extinction was found on the grassland at Chitwan National Park in significant numbers. This species of bird migrates to Chitwan National Park from India during winter and generally stays up to May.
Take a trip to Chitwan