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  • greater-adjutant greater adjutant

    greater adjutant

    Leptoptilos dubius
    BASIC:
    • Size (cm): 120 - 150 cm
    • Size (inches): 0 - 0 in
    • Primary Color: Brown
    • Secondary Color: White
    • Bird Type:
    • Beak Type: Not specified
    LOCAL NAMES:
    • assamese: হাড়গিলা
    • bengali: হাড়গিলা, বড় মদনটাক
    • bhojpuri: धेनुक
    • gujarati: જમાદાર ઢોંક, મોટો જમાદાર
    • hindi: हरगिला
    • kannada: ಅಡ್ಜುಟೆಂಟ್ ಹಕ್ಕಿ
    • malayalam: വയൽനായ്ക്കൻ
    • marathi: क्षत्र बलाक, चंद्र्याढोक (विदर्भ)
    • nepali: राजगरुड
    • oriya: ହାଡଗିଳା
    • punjabi: ਬਢੀਂਗ
    • sanskrit: बृहद् बक, महाचंचुबक, दीर्घपाद कङ्क
    • tamil: பெருநாரை
    • telugu: పెద్ద కొంగ, చనుమల కొంగ
    • french: Marabout argala
    • spanish: Marabú argala, cigüeña de cuello castaño
    • portuguese: adjunte-gigante, marabu-gigante

    Introduction

    The Greater Adjutant (Leptoptilos dubius) is a massive member of the stork family, Ciconiidae. Once widely distributed across Southern Asia, this impressive bird is now restricted to a few breeding populations in India and Cambodia. Known for its distinctively stiff, military-like gait, it is a unique species that plays a vital role as a scavenger in its ecosystem.

    Physical Appearance

    Standing between 120-150 cm tall, the Greater Adjutant is one of the largest extant storks. Key physical features include:

    • Bill: A massive, wedge-shaped bill that is pale grey with a dark base.
    • Neck Pouch: A distinctive, pendant inflatable pouch that connects to air passages rather than the digestive tract.
    • Plumage: Dark wings contrasting with light grey secondary coverts and a whitish underside.
    • Vulture-like features: A bare head and neck with a white collar ruff, an adaptation for its scavenging lifestyle.

    Habitat

    The Greater Adjutant typically frequents freshwater marshes, pools, swamp forests, and ricefields. While primarily a lowland species, it has been recorded at elevations up to 1,500 metres in the Himalayan foothills of Nepal. Interestingly, they are also frequently found in urban areas, foraging at disposal sites, rubbish dumps, and markets.

    Diet

    As an omnivorous scavenger, the Greater Adjutant has a diverse diet. While it primarily feeds on carrion and offal, it is an opportunistic predator that consumes:

    • Large insects, frogs, reptiles, and rodents.
    • Fish, with some specimens weighing up to 2-3 kg.
    • Wild ducks, which it has been known to swallow whole.
    • Human and animal excreta found at garbage dumps.

    Breeding Nesting

    The species currently has only three known breeding populations: two in India (the largest in Assam and a smaller one near Bhagalpur) and one in Cambodia. They disperse widely after the breeding season. During this time, their neck and pouch become bright orange, and their legs may take on a reddish tint.

    Behavior

    This bird is known for its military-like gait when walking on the ground. During the day, it utilizes thermals to soar at high altitudes alongside vultures. They are social scavengers, often gathering in large numbers around carcasses or at urban landfill sites where food is abundant.

    Conservation Status

    The Greater Adjutant is currently endangered. Historically common across Asia, its population plummeted to an estimated 1,000 individuals by 2008. The decline is attributed to habitat loss and improved urban sanitation, which reduced their traditional food sources in cities like Calcutta.

    Interesting Facts

    1. The name 'Hargila' is derived from Assamese words meaning 'bone-swallower.'
    2. In the 19th century, they were so common in Calcutta that they appeared on the city's coat of arms.
    3. Despite popular belief, their inflatable neck pouch is filled with air and is not used for food storage.
    4. They were once valued so highly as scavengers that they were featured in the logo of the Calcutta Municipal Corporation.

    Tips Birdwatchers

    For those looking to spot this rare stork, the Assam region of India offers the best opportunities, particularly near wetlands or large landfill sites where they congregate to feed. Look for their massive silhouette soaring with vultures, and use binoculars to distinguish them from the smaller Lesser Adjutant, which lacks the pendant neck pouch.

    Conclusion

    The Greater Adjutant is a remarkable bird that serves as a critical biological cleaner in its environment. While its numbers have faced a steep decline, conservation efforts in India and Cambodia remain vital to ensuring that this 'military' stork continues to soar over the wetlands of Asia.

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