Bush Stone-curlew

Bush Stone-curlew
Conservation status: Lower risk (nt)
Missing image
Bush_Stone-curlew.jpg
Bush Stone-curlew


Head
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Charadriiformes
Family:Burhinidae
Genus:Burhinus
Species:B. grallarius
Binomial name
Burhinus grallarius
Latham, 1802

The Bush Stone-curlew (Burhinus grallarius) is a large, ground-dwelling bird endemic to Australia. Although it looks rather like a wader and is related to the oystercatchers, avocets and plovers, it is a dry-land predator: essentially a winged terrestrial carnivore.

Like most stone-curlews, it is mainly nocturnal and specialises in hunting small grassland animals: frogs, spiders, insects, molluscs, crustaceans, snakes, lizards and small mammals are all taken, mostly gleaned or probed from soft soil or rotting wood; also a few seeds or tubers, particularly in drought years. Birds usually forage individually or in pairs over a large home range, particularly on moonlit nights.

During the day, Bush Stone-curlews tend to remain inactive, sheltering amongst tall grass or low shrubs and relying on their cryptic plumage to protect them from their only natural predators: raptors. When disturbed, they freeze motionless, often in odd-looking postures. For visual predators like raptors (and humans), this works well, but it serves little purpose with introduced feral animals that hunt by scent: notably foxes.

Despite their ungainly appearance and habit of freezing motionless, they are sure-footed, fast and agile on the ground, and although they seldom fly during daylight hours, they are far from clumsy in the air; flight is rapid and direct on long, broad wings.

Missing image
Bush-Stone-curlew-350.jpg
Male Bush Stone-curlew attempting to hide motionless in shrubery

Bush Stone-curlews remain reasonably common in the north of Australia, but have become rare in the more fertle south, particularly Victoria and are classified by that state as vulnerable. Many experts believe that fox predation is a prime factor in their decline, however there are areas where foxes are common yet the Bush Stone-curlew population remains healthy, so the true causes remain uncertain. Large-scale habitat destruction and fragmentation has undoubtedly been important, and may well be the major factor.

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