Carib Grackle vs Great-Tailed Grackle

Carib Grackle

Quiscalus lugubris

How to recognise a carib grackle?

General appearance

The Carib Grackle, a type of blackbird, is known for its glossy black plumage which emits a metallic sheen in sunlight. They typically measure 28cm in length and have long tails, large eyes that are strikingly yellow, and a sharp, pointed bill.

Male vs female

Males are noticeably larger and possess a longer and more curved tail, compared to females. Additionally, males exhibit a more vibrant iridescence compared to the females' brown-toned coloration. The difference in color intensity serves as a critical identifier in distinguishing between the sexes in the wild.

Juvenile

Juvenile Carib Grackles, particularly males, initially appear a duller black, taking a season to develop the glossy sheen of adults. They also posses brown eyes which transition to the adult's characteristic yellow with age. Observing these qualities allows for identification of juveniles in the wild.

Size

7.9 - 11.0 in/1.7 - 2.8 oz

Habitat

Primary habitat

The Carib grackle favors warm, tropical climates. Typically found in the Lesser Antilles and northern South America.

Additional range

Besides natural environments, it also adapts to human habitats, often spotted in urban or suburban areas and at agricultural sites.

Range Map

What do Carib grackles like to eat?

Natural diet

The Carib grackle primarily feeds on a variety of insects, including beetles and grasshoppers. It also consumes small frogs, lizards, and crabs, exploiting its opportunistic feeding behavior. These birds are known to forage on the ground and in trees, using their keen eyesight to locate prey. Seeds and grains form part of their diet as well, with the grackles often found in fields and agricultural areas scavenging for spilled cereals.

Bird feeders

Carib grackles commonly visit bird feeders, where they consume seeds and grains such as sunflower seeds and cracked corn. They are attracted to suet and sometimes feed on fruit or bread left out for other birds. These adaptable birds can adjust their feeding habits to the available food sources, making them frequent visitors to backyard feeders when natural food is scarce.

What does a carib grackle sound like?

The Carib grackle, a bird species native to the Caribbean, produces a range of sounds including songs and calls. The male's songs are a complex mix of whistles, clicks, and gurgles, often ending with a sharp "chit" sound. The calls are more straightforward- typically a harsh "chack" or mellower "cheeu". The female grackle's vocalizations are simpler, mostly consisting of chattering and fighting squeaks. They may also mimic other bird species. The Carib grackles are most vocal at dawn and dusk.

Call

Audio by Gabriel Leite

/ CC BY-NC-SA 4.0

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Great-Tailed Grackle

Quiscalus mexicanus

Also known as: Mexican Grackle

How to recognise a great-tailed grackle?

General appearance

The great-tailed grackle is a large, lanky bird with long legs and an iridescent plumage. It has a distinct wedge-shaped tail and a strong, pointed bill. Its coloration ranges from glossy black to purplish-blue in good light, and it often emits loud, varied calls that echo in open areas.

Male vs female

Males are larger with predominantly glossy black feathers and striking iridescence, mainly purplish-blue on the head and body. Females are smaller, predominantly brown, with lighter underparts and less iridescence. Males have longer tails which contribute to their distinctive silhouette.

Juvenile

Juvenile great-tailed grackles resemble adult females but have a more muted coloration and slightly shorter tails. As they mature, their plumage transitions to match their respective adult coloration, either glossy black for males or dark brown for females.

Size

15.0 - 18.1 in/4.1 - 9.3 oz

Habitat

Primary habitat

Great-tailed grackles largely occupy open and semi-open terrains such as groves, thickets, farms, towns, and city parks. They are found throughout different lowland landscapes.

Additional range

This species adapts to a variety of environments from farmland, marshes, irrigated fields to suburban lawns and brushy areas. They avoid true deserts, but can thrive near water sources in dry regions.

Range Map

What do great-tailed grackles like to eat?

Natural diet

The great-tailed grackle is omnivorous and has an extremely varied natural diet. It feeds on many insects and also consumes spiders, millipedes, snails, crayfish, tadpoles, small fish, lizards, and eggs and nestlings of other birds. Occasionally, it may also eat adult birds. In addition to animal matter, the grackle's diet includes a wide variety of seeds, waste grain, berries, fruits, and nuts.

Bird feeders

At bird feeders, great-tailed grackles are likely to consume seeds and grains, which are common provisions. They may also eat peanuts if available, taking advantage of the food offered by humans.

What does a great-tailed grackle sound like?

The Great-tailed Grackle boasts a multifaceted vocal repertoire, featuring a wide range of whistles, clucks, and hissing notes that can be both raucous and melodic. These vocalizations often fit into varying patterns such as falling, flat, rising, and undulating. These complex calls captivate with diverse tonalities like buzz, chatter, chirp or chip, hi, rattle, scream, trill, and whistle, making the Great-tailed Grackle's communication exceptionally intricate and distinct amongst avian species.

Call

Audio by Niels Krabbe

/ CC BY-SA 4.0

Call

Audio by Niels Krabbe

/ CC BY-SA 4.0

Call

Audio by Gabriel Leite

/ CC BY-NC-SA 4.0

There's more to learn about Great-Tailed Grackle

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Carib Grackle

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Great-Tailed Grackle

Carib Grackle

Quiscalus lugubris

General appearance

The Carib Grackle, a type of blackbird, is known for its glossy black plumage which emits a metallic sheen in sunlight. They typically measure 28cm in length and have long tails, large eyes that are strikingly yellow, and a sharp, pointed bill.

Male vs female

Males are noticeably larger and possess a longer and more curved tail, compared to females. Additionally, males exhibit a more vibrant iridescence compared to the females' brown-toned coloration. The difference in color intensity serves as a critical identifier in distinguishing between the sexes in the wild.

Juvenile

Juvenile Carib Grackles, particularly males, initially appear a duller black, taking a season to develop the glossy sheen of adults. They also posses brown eyes which transition to the adult's characteristic yellow with age. Observing these qualities allows for identification of juveniles in the wild.

Size

7.9 - 11.0 in/1.7 - 2.8 oz

There's more to learn about Carib Grackle

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Great-Tailed Grackle

Quiscalus mexicanus

Also known as: Mexican Grackle

General appearance

The great-tailed grackle is a large, lanky bird with long legs and an iridescent plumage. It has a distinct wedge-shaped tail and a strong, pointed bill. Its coloration ranges from glossy black to purplish-blue in good light, and it often emits loud, varied calls that echo in open areas.

Male vs female

Males are larger with predominantly glossy black feathers and striking iridescence, mainly purplish-blue on the head and body. Females are smaller, predominantly brown, with lighter underparts and less iridescence. Males have longer tails which contribute to their distinctive silhouette.

Juvenile

Juvenile great-tailed grackles resemble adult females but have a more muted coloration and slightly shorter tails. As they mature, their plumage transitions to match their respective adult coloration, either glossy black for males or dark brown for females.

Size

15.0 - 18.1 in/4.1 - 9.3 oz

There's more to learn about Great-Tailed Grackle

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How to tell the Carib Grackle from the Great-Tailed Grackle

Visual differences

The Carib Grackle measures around 8-11 inches and appears smaller than the Great-Tailed Grackle, which is 15-18 inches long. The Carib Grackle is glossy black with yellow eyes and a sharp bill, while the Great-Tailed Grackle is a larger, lanky bird with iridescent black to purplish-blue plumage and a distinct wedge-shaped tail with long legs. Males of both species are larger with more striking iridescence compared to their respective females. Juvenile Carib Grackles start dull black, whereas juvenile Great-Tailed Grackles resemble adult females with muted brown tones.

Key differences and behavior

Carib Grackles and Great-Tailed Grackles differ significantly in behavior and ecology. Carib Grackles (7.9-11 in, 1.7-2.8 oz) are sociable, often forming defensive groups against predators, and are adaptable to tropical urban and suburban areas. They engage in elaborate courtship displays and utilize urban gardens for nesting. Their diet consists mainly of insects, small vertebrates, and seeds, with frequent visits to bird feeders. In contrast, Great-Tailed Grackles (15-18 in, 4.1-9.3 oz) are prevalent in open and semi-open landscapes across North America. They gather in large winter roosts and recognize human researchers, signaling with alarm calls. They form nesting colonies near water, and both sexes may be polygamous. Their diverse diet includes insects, small animals, and a wide array of plant material, reflecting their omnivorous nature and adaptability to various environments including bird feeders.