Carib Grackle
Quiscalus lugubris
Male Carib grackles average 26 cm (10 in) long and females about 22 cm (8.7 in). Males weigh 66 to 80 g (2.3 to 2.8 oz) and females 49 to 58 g (1.7 to 2.0 oz). Males of all subspecies have a long keel-shaped ("V") tail; females' tails are shorter and flat. Adult males of the nominate subspecies Q. l. lugubris are completely black with a violet gloss on most of the body; it is slightly less strong on the underparts. The gloss is more violet-blue on the wing coverts and greener on the flight feathers. Voice: The Carib grackle's song varies among the subspecies but is "generally a series of squeaky notes". In the Antilles its vocalization is generally "3-7 syllables with rising inflection" and also "whistles and chucks". On Martinique it makes "a descending, Molothrus-like whistle followed by a complex warble" and on Trinidad "a series of rhythmic rattles ending in metallic sound".
ID text from Wikipedia, CC BY-SA 4.0
Great-tailed Grackle
Quiscalus mexicanus
Great-tailed grackles are medium-sized birds (larger than starlings and smaller than crows; 38–46 cm (15–18 in) with males weighing 203–265 g (7.2–9.3 oz) and females 115–142 g (4.1–5.0 oz), and both sexes have long tails. Wingspan ranging 48–58 cm (19–23 in). Males are iridescent black with a purple-blue sheen on the feathers of the head and upper body, while females are brown with darker wings and tail. Adults of both sexes have bright yellow eyes, while juveniles of both sexes have brown eyes and brown plumage like females (except for streaks on the breast). Voice: Great-tailed grackles have an unusually large repertoire of vocalizations that are used year-round. The sounds range from "sweet, tinkling notes" to a "rusty gate hinge". Males use a wider variety of vocalization types, while females engage mostly in "chatter", however there is a report of a female performing the "territorial song".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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