Lexi Webster
Australia is home to five species of corvids, three of which are crows: the Torresian Crow, the Little Crow, and the Australian Crow. The Torresian Crow (Corvus orru) is native to the north and west of Australia, as well as nearby islands in Indonesia and Papua New Guinea. It is a large corvid, measuring about 48-53 cm in length, with black plumage, a white iris, and a robust bill. The species is well-adapted to various habitats, including tropical rainforests, eucalyptus woodland, open scrub, beaches, and urban areas. In Western Australia, the Torresian Crow can be found from Geraldton to Norseman, and it is more commonly seen in coastal and tropical areas.
| Characteristics | Values |
|---|---|
| Name | Torresian crow |
| Scientific Name | Corvus orru |
| Other Names | Australian crow, Papuan crow |
| Colour | Black plumage, beak and mouth |
| Eye Colour | White irises, blue eye-ring |
| Size | 48-53 cm in length |
| Habitat | Tropical rainforests, eucalyptus woodland, open scrub, beaches, swamps, offshore islands, fringe habitats including farmland, towns and cities |
| Distribution | Western Australia, from Geraldton to Norseman, north and east of Perth, Northern Territory, New South Wales, Queensland |
| Diet | Carrion, invertebrates, anthropogenic waste |
| Behaviour | Opportunistic, intelligent, social, curious, good long-term memory |
| Nest | Made of finer material than other corvid species |
| Breeding Season | August to October in the south; November to February in the north |
| Native to Western Australia | Yes |
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What You'll Learn
The Torresian crow is native to Western Australia
The Torresian crow (Corvus orru), also known as the Australian crow or Papuan crow, is a passerine bird in the crow family native to Western Australia and the north and west of Australia. The species has black plumage, a beak, and a mouth with white irises. The base of the feathers on the head and neck is white. The bird was first described by French ornithologist Charles Lucien Bonaparte in 1850.
The Torresian crow is commonly found in tropical rainforests, eucalyptus woodland, open scrub, beaches, swamps, offshore islands, and fringe habitats such as farmland, towns, and cities. They are the most common bird species on farms in Northern Australia, where they are considered pests by farmers due to their damage to crops such as sweet corn, peanuts, and wheat.
The Torresian crow is well-adapted to urban environments, exploiting the abundance of anthropogenic food resources and dominating the resulting habitat. Their diet consists of carrion, which is readily available in urban areas due to roadkill, as well as invertebrates found in lawns and parkland.
The Torresian crow is closely related to the Australian raven, little raven, and forest raven, sharing similar features and behaviours. The crows and ravens are known for their intelligence, problem-solving abilities, and opportunistic nature.
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The Australian raven is native to Western Australia
The Australian raven, a member of the Corvidae family, is native to Western Australia. It is a highly intelligent bird with problem-solving abilities, tool use, and social cognition. The species was first described by Nicholas Aylward Vigors and Thomas Horsfield in 1827, who noted its similarity in appearance to the European carrion crow. The Australian raven has a wingspan of around 1 meter and is the largest of Australia's corvids, measuring 46-53 cm in length. Its feathers are jet black with a purple, blue, or green sheen, and its throat feathers (hackles) are longer than those of other species.
The Australian raven is an omnivore, and its diet includes a wide variety of plant and animal material, such as fruits, seeds, lizards, chicks of other bird species, and small mammals. They are also known to scavenge through waste bins and disposal sites for human food waste. The Australian raven is a social bird, typically found in pairs, and they communicate through a variety of calls, including a slow, drawn-out territorial call. They build large, untidy nests of sticks lined with grasses, bark, and feathers, usually placed high in tall trees or on artificial structures.
The Australian raven is native to a wide range of natural and modified habitats in Western Australia, including eucalypt-dominated sclerophyll forests, farmlands, heathlands, and mangroves. They are well-adapted to urban environments and are commonly found in cities such as Perth, Sydney, and Canberra. The species is also present in the Bindjareb (Peel) region of Western Australia, where it is the most frequently observed corvid.
The Australian raven has two recognised subspecies: C. c. coronoides, found in eastern Australia, and C. c. perplexus, found in Western Australia. Genetic studies suggest that these subspecies may be distinct enough to be considered separate species. The Australian raven is closely related to the two other raven species occurring in Australia, the little raven and the forest raven, as well as the Torresian and little crow.
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Little crows are native to Western Australia
Little crows are widespread to the west of the Great Divide in mainland Australia, including South Australia and most of Western Australia. They are rarely found in far northern tropical areas of Australia and are not seen in Tasmania. They are found mainly in dry open woodlands, especially in Mallee, Mulga, and other acacia scrubs. They are also seen in worked farmland and are often attracted to human-created food sources, such as town garbage and campsites.
Little crows are highly mobile, except during breeding seasons when breeding pairs defend small territories around nest trees. They breed whenever conditions are suitable, often after heavy rain. Their nests are made of small sticks and mud, lined with bark, feathers, leaves, or fur. The nests are usually built in an upright, multi-pronged fork at or near the top of a tree, usually among foliage but occasionally in a dead tree.
Little crows are considered a pest of the sheep industry, especially during lambing season, although studies have shown that they usually only attack sick or dead lambs. They are useful to farmers because they eat large numbers of grasshoppers, blowflies, and other insect pests or their larvae.
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Crows are highly intelligent
These birds have remarkable memories and can remember the faces of hundreds of other crows, forming complex social hierarchies within their flocks. They also remember people who have wronged them and will hold a grudge, sometimes for years. For example, a crow that has been chased away from a bird feeder by a particular person may remember that individual's face and subsequently dive-bomb or scold them whenever they are spotted. This ability to recognize and remember human faces is a testament to their remarkable memory and cognitive abilities.
The intelligence of crows also extends to their communication skills. They have a complex language of their own, with various caws, squawks, and body postures that convey different messages. For instance, they have distinct calls to warn others of specific types of predators, and they can also convey information about food sources and potential dangers. Their vocalizations are incredibly nuanced, and they can even modify their calls to convey urgency or calm, depending on the situation.
Crows have also shown an ability to plan ahead and make decisions based on future needs. For example, they sometimes cache or store food in hidden locations to ensure they have reserves for leaner times. Interestingly, they take into account the potential theft of their food stores by other crows or animals and will often move their caches to safer locations if they feel their current hiding spot has been compromised. This demonstrates their ability to think strategically and make decisions based on anticipated future events.
Furthermore, crows have displayed an understanding of basic physics and have been observed dropping stones into narrow tubes to raise the water level and make it accessible, showcasing their problem-solving abilities. They also learn from each other and pass on knowledge to future generations, indicating a form of cultural transmission within crow communities. This perpetuates and expands their intelligence as a species, allowing them to adapt to new environments and challenges over time.
In conclusion, crows are incredibly intelligent creatures that exhibit many complex behaviours and abilities. Their problem-solving skills, memory, communication, and future planning set them apart from many other animal species. As humans, we can learn a great deal about the natural world and animal cognition by studying these fascinating birds and recognizing the sophistication of their behaviours.
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Crows are native to other regions, too
Crows are indeed native to Western Australia, but they are also prevalent in many other parts of the world. While some people may associate crows primarily with the mysterious and rugged Australian landscape, these birds have a much wider reach and have adapted to a variety of habitats.
One of the most common species of crow is the American crow (*Corvus brachyrhynchos*), which, as the name suggests, is native to North America. These crows can be found across the continent, from Canada down to Mexico, and have also been introduced to other regions, including New Zealand and some parts of Europe. They are highly adaptable and often thrive in urban environments, becoming a familiar sight in cities and towns.
In Europe, the carrion crow (*Corvus corone*) and the hooded crow (*Corvus cornix*) are two species that are widely distributed across the continent. Carrion crows, as their name implies, are often associated with scavenging and can be found in a variety of habitats, from open countryside to urban parks. Hooded crows have a similar range and are known for their intelligence and problem-solving abilities. Both of these species are considered widespread and common throughout Europe.
Asia is also home to a number of crow species, including the large and distinctive black-billed magpie (*Pica pica*) found in eastern Asia, and the house crow (*Corvus splendens*), which is native to southern Asia and has also been introduced to Africa and Australia. These crows have adapted well to human-modified environments and are often considered pests due to their propensity for scavenging and their bold behavior around people.
Finally, crows have also established themselves in South America, with the shiny cowbird (*Molothrus bonariensis*) being one of the most widespread and common species across the continent. While cowbirds are technically in a different family from true crows, they share many similar characteristics and behaviors, and are often mistaken for crows due to their all-black plumage and similar habits.
So, while crows are indeed native to Western Australia and have become iconic components of the region's wildlife, they are also prevalent and well-adapted to a variety of habitats across the globe. Their intelligence, adaptability, and opportunistic nature have allowed them to thrive in diverse environments, making them a familiar presence in many parts of the world.
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Frequently asked questions
Yes, crows are native to Western Australia. The three common corvids in Western Australia are the Australian Raven, Little Crow, and Torresian Crow.
Corvids are the family of birds that include crows and ravens. They are highly social, curious, and opportunistic, with exceptional long-term memory.
The Torresian Crow is a large corvid, about the same size as the Eurasian carrion crow but with a more robust bill and slightly longer legs. Its plumage is glossy black on the back and dull black on the breast, with a distinctive square-shaped tail tip.
Torresian Crows are commonly found in the tropical areas of northern Australia and Western Australia, from Geraldton to Norseman. They are also found in Papua New Guinea, the Moluccas, and New Britain.
Ravens are generally larger than crows. In Australia, ravens are distinguished from crows by their long chest feathers, or throat hackles.
