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Side-by-Side Comparison

Attribute	Yellow-shouldered Blackbird	Slender-billed Grackle
Scientific Name	Agelaius xanthomus	Quiscalus palustris
Order	Passeriformes	Passeriformes
Family	Icteridae	Icteridae
Conservation Status	Endangered	Extinct
Length	—	—
Wingspan	20.2 cm (8.0 in)	—
Weight	38.440000000000005 g (1.36 oz)	—
Diet	--	--
Clutch Size	1-4	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

Yellow-shouldered Blackbird only

🏖️ Coastal 🌲 Forest 🌾 Grassland

Slender-billed Grackle only

🌿 Wetland

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Conservation Status

Endangered

Yellow-shouldered Blackbird

Extinct

Slender-billed Grackle

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About These Birds

Yellow-shouldered Blackbird

The Yellow-shouldered Blackbird, <em>Agelaius xanthomus</em>, is a member of the family Icteridae, the New World blackbirds, and is endemic to Puerto Rico and its offshore cays. Detailed plumage and behavioral descriptions of this species are limited in the available literature. This species occupies a range of habitats including coastal areas, forest edges, and grasslands. It is restricted to Puerto Rico and a few associated islands. The Yellow-shouldered Blackbird is classified as Endangered, a reflection of severe population declines caused by …

Slender-billed Grackle

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