Large-Billed Crow vs Torresian Crow

Large-Billed Crow

Corvus macrorhynchos

Also known as: Thick-Billed Crow

How to recognise a large-billed crow?

General appearance

The large-billed crow, as the name suggests, is notable for its relatively large beak. These crows are generally black, even though a gray or silver sheen may appear over the feathers in bright sunlight. Their eyes are often a stark contrast in a striking shade of white or pale blue.

Male vs female

Sexual dimorphism is less prominent in large-billed crows, making it difficult to distinguish males from females based on physical appearance alone. Both genders share similar coloration and size, although males tend to be slightly larger.

Juvenile

Juvenile large-billed crows resemble adults but tend to have lighter-colored eyes, usually a duller blue or gray. Additionally, juveniles may be identified by the comparatively smaller size of their beaks, which gradually increase as they age.

Size

18.1 - 23.2 in/15.9 - 35.3 oz

Habitat

Primary habitat

The large-billed crow is native to South and Southeast Asia. It prefers tropical climates but can also adapt to various environments like forests, grasslands and human settlements.

Additional range

Sometimes this species extends its range north to the Russian Far East and Japan, likely due to increased availability of food resources.

Range Map

What do large-billed crows like to eat?

Natural diet

The large-billed crow is omnivorous, feeding on a diverse array of natural foods. Its diet primarily consists of insects, small mammals, fruits, grains, and carrion. It is also known to consume eggs and nestlings of other birds. It forages in a variety of habitats, including forests, fields, and urban areas, demonstrating great adaptability in its dietary habits.

Bird feeders

At bird feeders, the large-billed crow is attracted to a range of offerings. It commonly consumes seeds, nuts, and suet. These birds may also take advantage of kitchen scraps, such as bread and meat, provided at feeders. Their adaptable nature allows them to exploit various food sources found around human habitation.

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Torresian Crow

Corvus orru

Also known as: Australian Crow, Papuan Crow

How to recognise a Torresian crow?

General appearance

The Torresian Crow (Corvus orru) is a large black bird with a slightly curved bill and black feathers that may display a bluish-purple sheen in direct sunlight. Its eyes are stark white or grey, surrounded by a ring of bare skin, a prominent feature. They are approximately 50-55cm in length, with a wingspan of around 1 metre.

Male vs female

There is little sexual dimorphism within the Torresian Crow species. However, males are typically slightly larger than females, but this difference is subtle and can be difficult to discern in the wild.

Juvenile

Juvenile Torresian Crows resemble adults but their eyes are blue-grey at the initial stage. The plumage is slightly duller and lacks the adult's sheen. The bill of a juvenile crow is typically shorter and the bare skin around their eyes develops as they mature.

Size

18.9 - 20.9 in/15.2 - 24.7 oz

Habitat

Primary habitat

The Torresian crow inhabits a wide range of habitats including forest edges, woodlands, grasslands, and mangroves mainly in Northern and Eastern Australia.

Additional range

This crow species is capable of inhabiting urban areas. It has adapted well to a variety of climates, from the tropics to temperate regions.

Range Map

What do Torresian crows like to eat?

Natural diet

The Torresian crow is an omnivorous bird that includes a wide range of food sources in its natural diet. It primarily feeds on insects, small mammals, and eggs. This crow also consumes a variety of plant matter such as seeds, berries, and fruits. It often forages on the ground for invertebrates, carrion, and discarded human food.

Bird feeders

While the Torresian crow is not a frequent visitor to bird feeders, it may occasionally be attracted to them, particularly if they offer fatty or energy-rich foods. These crows may consume suet, peanuts, and other nuts, as well as any available fruit pieces. Additionally, they might scavenge for various bird seed mixes, although this is less common.

What does a Torresian crow sound like?

The Torresian crow, a common Australian bird, has a deep, resonant "ark-ark-ark" or "aw-aw-aw" call that’s distinctive and can go on for several seconds. These crows are clever mimics and their vocalizations may also include a range of noises, including human speech, if trained. Their songs, however, aren't as melodious and typically consist of longer sequences of the same raspy caw, often used to communicate with each other over distance.

Call

Audio by 7575u

/ CC BY-SA 4.0

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Large-Billed Crow

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Torresian Crow

Large-Billed Crow

Corvus macrorhynchos

Also known as: Thick-Billed Crow

General appearance

The large-billed crow, as the name suggests, is notable for its relatively large beak. These crows are generally black, even though a gray or silver sheen may appear over the feathers in bright sunlight. Their eyes are often a stark contrast in a striking shade of white or pale blue.

Male vs female

Sexual dimorphism is less prominent in large-billed crows, making it difficult to distinguish males from females based on physical appearance alone. Both genders share similar coloration and size, although males tend to be slightly larger.

Juvenile

Juvenile large-billed crows resemble adults but tend to have lighter-colored eyes, usually a duller blue or gray. Additionally, juveniles may be identified by the comparatively smaller size of their beaks, which gradually increase as they age.

Size

18.1 - 23.2 in/15.9 - 35.3 oz

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Torresian Crow

Corvus orru

Also known as: Australian Crow, Papuan Crow

General appearance

The Torresian Crow (Corvus orru) is a large black bird with a slightly curved bill and black feathers that may display a bluish-purple sheen in direct sunlight. Its eyes are stark white or grey, surrounded by a ring of bare skin, a prominent feature. They are approximately 50-55cm in length, with a wingspan of around 1 metre.

Male vs female

There is little sexual dimorphism within the Torresian Crow species. However, males are typically slightly larger than females, but this difference is subtle and can be difficult to discern in the wild.

Juvenile

Juvenile Torresian Crows resemble adults but their eyes are blue-grey at the initial stage. The plumage is slightly duller and lacks the adult's sheen. The bill of a juvenile crow is typically shorter and the bare skin around their eyes develops as they mature.

Size

18.9 - 20.9 in/15.2 - 24.7 oz

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How to tell the Large-Billed Crow from the Torresian Crow

Visual differences

The Large-Billed Crow is larger (18-23 inches) with a notably large beak, while the Torresian Crow is slightly smaller (19-21 inches) with a more curved bill. The Large-Billed Crow has a gray or silver sheen under sunlight, contrasted with the Torresian's bluish-purple sheen. Both crows have stark white or grey eyes, though the Torresian Crow features a distinctive ring of bare skin around its eyes. Additionally, Juvenile Large-Billed Crows have lighter eyes and smaller beaks, whereas Juvenile Torresians have blue-grey eyes and a slightly duller plumage.

Key differences and behavior

The Large-Billed Crow (Corvus macrorhynchos) and the Torresian Crow (Corvus orru) exhibit distinct behaviors and ecological adaptations. The Large-Billed Crow, found in South and Southeast Asia, displays adaptability to varied climates and uses tools due to its high intelligence. Known for scavenging, it consumes diverse foods from carrion to grains. Its breeding involves complex rituals, with nest-building in tall trees or urban areas. In contrast, the Torresian Crow, native to Northern and Eastern Australia, maintains strong territorial fidelity, often returning to familiar spots annually. It forms long-term pair bonds with cooperative behaviors, showing a preference for similar breeding and nesting habitats as the Large-Billed Crow. While both are omnivorous, the Torresian Crow prefers ground foraging and is less inclined to visit bird feeders, often relying on natural grounds for food like insects and small mammals.