Sarus Crane

Quick Take

• This bird is known to grieve so deeply it can literally waste away, and what triggers that response reveals something unexpected about crane behavior. Bonding and grief behavior →
• The sarus crane is the least social member of its family, yet it's the one most celebrated for loyalty. That contradiction runs deeper than it looks. Social habits explained →
• Adult sarus cranes have almost no natural predators, yet the species has been listed as vulnerable for over two decades, and the real threat isn't what most people would guess. Real threats to survival →
• Its scientific name is borrowed from a Greek queen punished for a very specific act of vanity, and the connection to this bird is stranger than it sounds. Mythological name origin →

The sarus crane (Antigone antigone) is the tallest flying bird in the world and is native to India, Southeast Asia, and northern Australia. They inhabit wetland environments like marshes and swamps and spend their days foraging for food in pairs. These birds are known for their lifelong pair bonds and emotional responses to the death of their partners.

5 Amazing Sarus Crane Facts

• The sarus crane is the tallest flying bird in the world, measuring almost six feet tall with an eight-foot wingspan.
• While still relatively social, they are the least social in the crane family. 
• Some accounts tell of sarus cranes weeping and starving to death if their mate dies.
• Parents use low calls to tell their chicks to freeze and lie still when danger lurks.
• This species is listed as “vulnerable” due to habitat loss, pesticide ingestion, and overhunting.

Where to Find the Sarus Crane

Sarus cranes are found across 13 countries in Asia and Australia, including India, China, Thailand, the Philippines, and Cambodia. The species has three distinct populations: Southeast Asia, the Indian subcontinent, and Northern Australia. These birds are nonmigratory, but they may move in response to monsoons and droughts. They inhabit wetland environments, such as marshes, swamps, ponds, canals, and flooded fields. Look for them in pairs or small family groups, wading in shallow water, looking for food. 

Nests

Their nests are large platforms constructed in marshes or paddy fields. The pair forms their nest using reeds, straw, grass, and mud to create an island that rises above the water. They do not try to conceal their platforms. Instead, both sexes fiercely defend their area.

Classification and Scientific Name

The sarus crane (Antigone antigone) is from the Gruiformes order in the Gruidae family, encompassing the cranes. The genus Antigone contains the largest of the crane members. The specific epithet by the same name refers to Greek mythology, where a queen turns into a swan for believing she is more beautiful than the goddess Hera. The sarus crane has three recognized extant subspecies.

Size, Appearance, & Behavior

The sarus crane is the tallest flying bird in the world. This large crane measures 3.75 to 5.9 feet long, weighs 11 to 26 pounds, and has a seven- to eight-foot wingspan. Its body and wings are grey, and its head is bare and red, with a greenish-grey bill. Males and females look similar, except that the males are slightly bigger on average. Juveniles are distinguishable by their fully-feathered brownish-grey heads.

They are the least social crane species but still form lifelong pair bonds, congregate in small family groups, and join large flocks outside the breeding season. Sarus cranes symbolize marital fidelity in India and are known for being loyal to their partners for life, even crying and starving to death if a partner dies. These cranes are relatively vocal and make a range of sounds from hissing to purring to screaming. They run at moderate speed and cover considerable ground while flying. However, they tend not to fly long distances.

Migration Pattern and Timing

Sarus cranes are nonmigratory, meaning they live on their breeding grounds year-round. However, they may move short distances in response to monsoons and drought.

Diet

Sarus cranes are omnivores that forage in shallow waters and fields.

What Does the Sarus Crane Eat?

Their diet consists of insects, aquatic plants, fish, crustaceans, and seeds. Occasionally, they will eat water snakes, bird eggs, and turtles. They forage in shallow waters and fields by probing the mud with their long bills. These birds do not feed in large flocks. Instead, they prefer to look for food in scattered pairs.

Predators, Threats, and Conservation Status

The IUCN lists the sarus crane as VU or “vulnerable.” This species has had a vulnerable status since 2000 due to a rapid decline in its population size. Its most significant threats are wetland habitat loss and degradation, and pesticide ingestion. This bird is also vulnerable to hunting and egg collecting for food and trade.

What Eats the Sarus Crane?

The sarus crane has no natural predators except humans, but its eggs and young fall victim to jackals, jungle crows, dingoes, and birds of prey. Their large size makes them intimidating to potential predators, and their nests are typically robbed when the parents leave them unattended. Parents use low calls to tell their chicks to freeze and lie still when danger lurks.

Reproduction, Young, and Molting

Sarus cranes are monogamous and mate for life. However, they may ‘divorce’ and find new partners. Their breeding season is from June to September (during the rainy season), and courtship rituals include loud calls, posturing, and dancing. Females lay one to two eggs, and both sexes take turns incubating for 26 to 35 days. The chicks can feed themselves within a few days and fly at around three months of age. They don’t typically leave their parents’ territory until the next breeding season. The sarus crane becomes sexually mature at around five years of age and has an average lifespan of 15.6 years. However, they can live up to 42 years.

Population

The global sarus crane population is estimated to number 15,000 to 17,500 mature individuals. Their population has decreased due to habitat loss, pesticides, and overhunting.