Rook vs Carrion Crow - Birdbuddy WIKI

Rook

Corvus frugilegus

How to recognise a rook?

General appearance

Rooks are generally about 45-47 cm in length, with dark feathery coloration, often appearing black with a purple or blue sheen in sunlight. They exhibit a prominent bare area around the base of their beak and on their face, which is grey-white in color. The bird also has uniquely fringed thigh feathers, long pointed wings, and a wedge-shaped tail.

Male vs female

Sexual dimorphism is not significant in rooks, making it difficult to distinguish males from females by appearance alone. Both genders share the same coloration and size. Behavioral observations during the breeding season may provide clues, as males tend to display more assertive posturing and are known to engage in aerial shows of acrobatics to attract mates.

Juvenile

Juveniles are similar in size to adults, but they can be distinguished by their fully feathered faces. This feature differentiates them from mature rooks, who have developed the distinctive bare patch. Juveniles may also exhibit lighter, more brownish feather coloration, transitioning to the adult's glossier black as they mature.

Size

17.3 - 18.1 in/11.5 - 20.1 oz

Habitat

Primary habitat

Rooks typically inhabit open or semi-open landscapes in the rural areas of Europe, western Asia and northern Africa.

Additional range

They are adaptable and can also be found in suburban and urban environments, and are more tolerant of colder climates than most other bird species.

Range Map

What do rooks like to eat?

Natural diet

Rooks are omnivorous birds that have a diverse natural diet. They primarily consume insects, earthworms, and other invertebrates, which they find by probing the ground with their beaks. Additionally, they eat plant matter, including grains, seeds, and fruits, particularly those from cereal crops. Occasionally, rooks may also consume small vertebrates, bird eggs, and carrion, which provides them with necessary nutrients.

Bird feeders

At bird feeders, rooks are known to consume a variety of offerings. They are attracted to peanuts, sunflower seeds, and suet. They also enjoy kitchen scraps, such as pieces of bread, cheese, and leftover meat. Rooks, being adaptable foragers, take advantage of the easy availability of food provided in residential areas, making them frequent visitors to people’s gardens and feeders.

What does a rook sound like?

The rook, a member of the crow family, is known for its sharp, piercing calls that might sound like "kaah-kaah". Frequently vocal, rooks often communicate using a variety of different sounds, including loud clicks, chuckles, and the chopped "caw" notes they are best known for. They do not have a typical song, as their sound repertoire primarily consists of diverse calls which they use for social bonding, territorial disputes, or alarm signaling.

Call

Audio by Vladimir Yu. Arkhipov, Arkhivov

/ CC BY-SA 3.0

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Carrion Crow

Corvus corone

How to recognise a carrion crow?

General appearance

The Carrion Crow is roughly 46-51 cm long with a wingspan of 93–104 cm. It has a pure black plumage, slightly glossy, with a strong, black bill, and black legs. Its eyes are dark brown or grey. It flies with a slow heavy flapping, and has a distinct 'cash' sound.

Male vs female

Males are slightly larger than females, but otherwise, the sexes are very similar in appearance. Generally, females may have a slightly lighter build, but it is challenging to distinguish between the two based solely on physical appearance.

Juvenile

Juvenile Carrion Crows are remarkably similar to adults, still black but slightly less glossy. Their eyes initially are blue, gradually changing to brown in the first year. They lack the ruffled plumage around the neck seen in adults.

Size

18.9 - 20.9 in/14.0 - 21.2 oz

Habitat

Primary habitat

Carrion crows typically inhabit open areas, farmlands, coastlines, woodlands and urban areas across Western Europe and Eastern Asia.

Additional range

They thrive in a range of climates, from chilly European winters to warm, humid Asian summers. Unexpectedly, they can also adapt to highly urbanized areas, including city centres.

Range Map

What do carrion crows like to eat?

Natural diet

Carrion crows have an omnivorous diet. They consume carrion, small mammals, birds' eggs, young birds, insects, and other invertebrates. They are also known to eat amphibians, reptiles, and some plant matter like seeds, fruits, and grains. Their opportunistic feeding habits allow them to adapt to various environments.

Bird feeders

At bird feeders, carrion crows are attracted to various types of food typically provided for other birds. They often consume peanuts, sunflower seeds, suet, and occasionally leftover scraps of food. Their adaptable nature makes them common visitors to bird feeders, where they capitalize on the readily available food sources.

What does a carrion crow sound like?

The carrion crow's vocalizations are loud and usually high-pitched, often characterized as harsh sounds or caws. Its primary call is a hard, sharp "kraa" or "kraa-kraa" that it repeats several times. Some describe its typical calls as raucous, varied, and repetitive. Though lacking a melodic song, the crow can mimic sounds from its environment including other birds and human-made noises. These behaviors, complemented by its complex communicative system, make its vocal repertoire quite diverse.

Call

Audio by Marie-Lan Taÿ Pamart

/ CC BY-SA 4.0

Call

Audio by Marie-Lan Taÿ Pamart

/ CC BY-SA 4.0

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Rook

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Carrion Crow

Rook

Corvus frugilegus

General appearance

Rooks are generally about 45-47 cm in length, with dark feathery coloration, often appearing black with a purple or blue sheen in sunlight. They exhibit a prominent bare area around the base of their beak and on their face, which is grey-white in color. The bird also has uniquely fringed thigh feathers, long pointed wings, and a wedge-shaped tail.

Male vs female

Sexual dimorphism is not significant in rooks, making it difficult to distinguish males from females by appearance alone. Both genders share the same coloration and size. Behavioral observations during the breeding season may provide clues, as males tend to display more assertive posturing and are known to engage in aerial shows of acrobatics to attract mates.

Juvenile

Juveniles are similar in size to adults, but they can be distinguished by their fully feathered faces. This feature differentiates them from mature rooks, who have developed the distinctive bare patch. Juveniles may also exhibit lighter, more brownish feather coloration, transitioning to the adult's glossier black as they mature.

Size

17.3 - 18.1 in/11.5 - 20.1 oz

There's more to learn about Rook

View full details

Carrion Crow

Corvus corone

General appearance

The Carrion Crow is roughly 46-51 cm long with a wingspan of 93–104 cm. It has a pure black plumage, slightly glossy, with a strong, black bill, and black legs. Its eyes are dark brown or grey. It flies with a slow heavy flapping, and has a distinct 'cash' sound.

Male vs female

Males are slightly larger than females, but otherwise, the sexes are very similar in appearance. Generally, females may have a slightly lighter build, but it is challenging to distinguish between the two based solely on physical appearance.

Juvenile

Juvenile Carrion Crows are remarkably similar to adults, still black but slightly less glossy. Their eyes initially are blue, gradually changing to brown in the first year. They lack the ruffled plumage around the neck seen in adults.

Size

18.9 - 20.9 in/14.0 - 21.2 oz

There's more to learn about Carrion Crow

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How to tell the Rook from the Carrion Crow

Visual differences

Rooks (17-18 in) and Carrion Crows (18-20 in) differ in several ways. Rooks have a distinctive grey-white bare skin around the base of their beak and fringed thigh feathers, while Carrion Crows are entirely black with no bare skin around their beak. Rooks possess a slender, pointed beak compared to the robust, black beak of the crow. Rooks display a purple or blue sheen on their plumage in sunlight, whereas Carrion Crows exhibit a consistent glossy black. Rook juveniles have fully feathered faces, unlike adult rooks, which helps distinguish them.

Key differences and behavior

Rooks and Carrion Crows exhibit distinct behavioral and ecological differences. Rooks are highly social, nesting in large colonies called rookeries, while Carrion Crows prefer solitary or paired living. Rooks are more communal, often seen in flocks, whereas Carrion Crows are more likely to be found alone or in small groups. In terms of habitat, both birds adapt to urban areas, but Rooks favor rural and open landscapes, while Carrion Crows are versatile, thriving in various environments, including city centers. Both species are omnivorous, yet Rooks focus more on invertebrates and grains, probing the ground, and Carrion Crows are more opportunistic, eating carrion and small mammals. For mating, Rooks display aerial acrobatics, breeding in colonies, whereas Carrion Crows engage in lifelong pair bonds with mutual preening. Both incubate 3-5 eggs, with chicks fledging around 32-35 days post-hatching.