India National Parks
Short wildlife Tour
Indian Crane
About Cranes in India
The Sarus crane is the world's tallest flying bird; a large male may stand six feet tall. There are three recognized subspecies of the sarus crane. The Indian sarus cranes live, as their name implies, predominately in Asia's
subcontinent. In areas dominated by the Hindu religion, the Indian sarus suffers little persecution. They have, as a result, lost much of their fear of humans and often nest in rice paddies where they are regarded as omens for good crops, especially in India.
Eastern sarus cranes were once abundant in Southeast Asia, but after decades of war they are missing from most of their former range. The few that remain nest in Cambodia in small wetlands surrounded by dry forest, but migrate to Viet Nam's lower Mekong Delta to winter at the Tram Chim National Reserve. There is a smaller non-migratory population, discovered by ICF staff in 1996, that lives in Myanmar's Irrawaddy delta. The third subspecies is the Australian sarus crane.Habitat
Northern and central India, southeastern Pakistan, southern Myanmar, Cambodia, southern Laos, Viet Nam, and northern Australia. The Philippine population of sarus cranes is probably extinct.Status
Despite cultural and religious protections, sarus cranes are vulnerable in most areas. Roughly 8,000 to 10,000 Indian sarus remain, though the population is declining due to the loss of wetlands and increasing amounts of pollution as the human population continues to grow. The greatest concentration of Indian sarus cranes occur where land use practices have changed little from traditional patterns. Some fear that the whole wetland food web on which sarus cranes depend may be under stress as pesticides and fertilizers become more widespread in the subcontinent's rural areas. Even in India's Keoladeo National Park, the number of sarus nests has decreased since the early 1980s. The Eastern sarus population in Southeast Asia is estimated at 500 to 1,500 birds. This subspecies is subject to hunting, pollution, warfare, heavy use of pesticides, and development of the Mekong River. A rapidly growing human population threatens to overwhelm areas that these cranes rely on. There is also trade in and hunting of both chicks and adult birds in some areas.Individual and Social Behavior
Cranes pursue small prey, and sometimes each other, by running. A running crane takes one to three steps per second and may use its wings for balance and to gain speed. While a running crane looks awkward, they can easily outrun humans. Cranes do not have webbed feet, but they can swim, although adult birds usually avoid deeper water unless necessary. Chicks are good swimmers and may leave the nest to follow the parents through the wetlands, sometimes within a few hours of hatching. Feathers give cranes both the ability to fly and to regulate their temperature. Made of the same material as human fingernails, feathers require constant attention. A crane preens by nibbling the base of a feather and then drawing it through the bill. Preening straightens and closes repairable gaps in the feather. When preening, cranes may apply oil to the feathers obtained from a special gland located on top of the tail. Contrary to previous belief, the oil does not serve as waterproofing, but helps condition the feathers and may also have fungicidal and antibacterial properties. Prolonged preening sessions follow water or dust bathing.Feeding
Feeding is one of a cranes' most time-consuming activities. Cranes spend most of the daylight hours in areas where food is most abundant. Cranes forage for roots and the starchy swellings found on the roots of certain plants called tubers. They also eat seeds, small mammals and reptiles, eggs of other birds, and invertebrates, such as worms, clams, insects, and crayfish. While cranes spend a great deal of time caring for their feathers, the feathers still wear out and are replaced during a seasonal molt. Many crane species are flightless during the molt, which usually occurs during late spring when the adults are raising their chicks. It is not unusual for flightless cranes to stay near heavier cover until they and their young can fly. Cranes, such as the crowned cranes, living in predator-dense areas lose their feathers over a longer period of time and never become flightless.Flight and Migration
Cranes typically run into the wind to achieve the lift necessary for flight, but if alarmed a crane can spring directly into flight. Cranes may fly as fast as 52 m.p.h. during level, flapping flight, but prefer to soar, especially during migration. When soaring in thermals (updrafts of warm air), cranes will circle until they reach a desired altitude, usually between 3,000 and 5,000 feet. Once the appropriate altitude is reached, the cranes leave the thermal and glide forward, slowly losing altitude. They then find another thermal and repeat the procedure. While slower than level flapping flight, soaring conserves energy. Cranes prefer to migrate at altitudes of less than 5,000 feet, but some species are forced to fly much higher. In North America, mountain ranges run north and south and birds migrate parallel to them. In Asia and Europe, however, mountain ranges, such as the Himalayas and Pyrenees, generally run east and west forcing cranes and other birds to negotiate mountain passes as high as 20,000 feet.Daily flights may range from a few miles in bad weather to several hundred miles if suitable stopover points are unavailable