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Wedge-tailed eagle

life science Maturity 7-9 Next article →

The wedge-tailed eagle, known scientifically as *Aquila audax*, is the largest bird of prey in Australia.

Wedge-tailed Eagle (35713410886)
Wedge-tailed Eagle (35713410886)

This massive raptor can be found across the Australian continent, from southern New Guinea in the north to the state of Tasmania in the south. It belongs to the genus *Aquila*, a group of large, dark-colored "booted eagles" found worldwide. These eagles are characterized by feathers that cover their legs, resembling baggy trousers. The species is a highly successful generalist, meaning it can survive in many different environments. They inhabit diverse landscapes including deserts, semi-deserts, plains, mountains, and even tropical rainforests.

Physically, the wedge-tailed eagle is built for powerful flight and hunting.

Wedge tailed eagle in flight04
Wedge tailed eagle in flight04

Adults possess long, broad wings and a very distinctive, wedge-shaped tail. This diamond-shaped tail is unique among the world's raptors. They have an elongated upper mandible, a strong beak, and powerful feet for grasping prey. Their wingspan is quite impressive, reaching approximately 2.2 times the bird's total body length. While they appear graceful while soaring on wind currents, their flight can be a struggle in dense forests. They often use deep, powerful wing beats to move, or they may glide with splayed primary feathers to manage air resistance.

Wedge tail eagle flight Jan13
Wedge tail eagle flight Jan13

As predators, wedge-tailed eagles play a vital role in their ecosystems.

Wedge-tailed eagle Diamantina Developmental Road Boulia Shire Queensland P1060464
Wedge-tailed eagle Diamantina Developmental Road Boulia Shire Queensland P1060464

Although they hunt many types of animals, including birds and reptiles, they are primarily mammal predators. They frequently hunt marsupials, including some very large macropods. Interestingly, the introduction of the European rabbit has actually benefited the species by providing a large, abundant food source. They are also known to eat carrion, which is the meat of animals that are already dead. This behavior is especially common among young eagles.

WedgetailEagleCarrion
WedgetailEagleCarrion

History and scientific classification provide more insight into this bird.

Aquila audax - Captain's Flat
Aquila audax - Captain's Flat

The English ornithologist John Latham first described the species in 1801. He originally named it *Vultur audax*, with *audax* being Latin for "bold." While the name suggests a daring nature, the eagles are actually quite wary and timid around humans. Scientists once placed them in a separate genus called *Uroaetus* due to their unique shape. However, modern genetic research using Mitochondrial and Nuclear DNA has placed them firmly within the *Aquila* genus. They are most closely related to the Verreaux's eagle of Africa and the Gurney's eagle.

Aquila audax 03 - Christopher Watson
Aquila audax 03 - Christopher Watson

There is also a specific subspecies found only in Tasmania, known as *A. a. fleayi*.

Tasmanian wedge-tailed eagle (Aquila audax fleayi) mobbed by forest ravens Scottsdale 2
Tasmanian wedge-tailed eagle (Aquila audax fleayi) mobbed by forest ravens Scottsdale 2

This Tasmanian population is larger than the mainland eagles and has much larger talons. Their color is also different, appearing as a deep chocolate brown rather than blackish. They feature a whitish buff color on the nape of the neck instead of tawny-rufous feathers. Genetic studies show there is no gene flow between these Tasmanian eagles and those on the mainland. This suggests they were likely separated by marine dispersal across narrow straits.

Life cycles and reproduction require great care and stability.

Wedge-tailed Eagle nestlings (Aquila audax) (15240110168)
Wedge-tailed Eagle nestlings (Aquila audax) (15240110168)

These eagles often pair for several years and may even mate for life. They build large stick nests in the tallest trees of a stand. A female typically lays one to four eggs, though two is the most common number. Breeding success is often threatened by human activities like logging. Because the birds are highly sensitive to disturbance, humans can cause them to abandon their young. Once the fledglings leave the nest after a few months, they tend to disperse widely.

Despite a history of being persecuted by humans through shooting and poisoning, the species is resilient.

Queensland State Archives 3201 Eaglehawk Baroona c 1910
Queensland State Archives 3201 Eaglehawk Baroona c 1910

Many people once hunted them because they believed the eagles killed sheep. However, their numbers have rebounded significantly. This recovery is partly due to the abundance of food sources like rabbits and roadkill. The wedge-tailed eagle remains a powerful and essential part of the Australian natural world, connecting various habitats and food webs through its presence.

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🖼️ Images & Media (24)
File:Wedge-tailed Eagle (35713410886).jpg
Wedge-tailed Eagle (35713410886).jpg
File:Wedge-tailed Eagle (Aquila audax) (8079586639).jpg
Wedge-tailed Eagle (Aquila audax) (8079586639).jpg
File:Tasmanian wedge-tailed eagle (Aquila audax fleayi) mobbed by forest ravens Scottsdale 2.jpg
Tasmanian wedge-tailed eagle (Aquila...
File:Wedge tailed eagle in flight04.jpg
Wedge tailed eagle in flight04.jpg
File:Wedge-tailed eagle Diamantina Developmental Road Boulia Shire Queensland P1060464.jpg
Wedge-tailed eagle Diamantina...
File:Aquila audax - Captain's Flat.jpg
Aquila audax - Captain's Flat.jpg
File:Aquila audax -Symbio Wildlife Park, New South Wales, Australia -head-8a.jpg
Aquila audax -Symbio Wildlife Park, New...
File:Aquila audax 03 - Christopher Watson.jpg
Aquila audax 03 - Christopher Watson.jpg
File:Wedge Tailed Eagle, Australia (6897593456).jpg
Wedge Tailed Eagle, Australia (6897593456).jpg
File:Aquila audax g2g - Christopher Watson.jpg
Aquila audax g2g - Christopher Watson.jpg
File:Wedge tail eagle flight Jan13.jpg
Wedge tail eagle flight Jan13.jpg
File:WedgetailEagleCarrion.jpg
WedgetailEagleCarrion.jpg

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