Bobolink

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Dolichonyx oryzivorus

Family: Icteridae — Blackbirds and Orioles

Identification

Breeding males are extraordinary and nearly unmistakable: mostly black below and on the face, with a pale buff-to-cream nape, white scapulars and rump, creating a pattern that seems almost reversed from a typical dark-backed songbird. Females, immatures, and nonbreeding males are warm buffy-brown with dark streaking, a bold pale supercilium, and a pointed, finch-like bill.

Similar Species

Breeding male Bobolinks are essentially unmistakable in North America, with their black underparts, pale back and rump, and buffy nape. Females and nonbreeding birds present a greater identification challenge and can superficially resemble longspurs or large sparrows. Their warm buff coloration, strong head stripes, relatively pointed tail feathers, and overall blackbird-like structure are useful identification clues. In flight, their distinctive calls may provide an important clue before the bird is seen well.

Natural History

Bobolinks are grassland blackbirds famous for the male’s bubbling, mechanical-sounding song delivered in display flights. They nest on the ground in dense grasses and feed on insects and seeds. They are among the hemisphere’s most remarkable songbird migrants, traveling from North American breeding grounds to central South America and back each year, a round trip that can approach 20,000 km

Habitat & Distribution

Originally associated with native tallgrass and mixed-grass prairies and meadows, Bobolinks now also breed extensively in hayfields, pastures, and other agricultural grasslands. This adaptation creates a conflict because mowing can occur while nests still contain eggs or young. During migration they use grasslands, marshes, and agricultural landscapes; wintering birds concentrate in grasslands and rice-growing regions of South America.

Conservation

IUCN Red List: Near Threatened (NT) • Population trend: Decreasing

Bobolink was moved from Least Concern to Near Threatened in the 2025-2 IUCN update, reflecting a genuine deterioration in status. Long-term declines are strongly associated with grassland loss and agricultural intensification. Early and frequent hay cutting can destroy nests and young, while habitat loss, pesticides, and persecution or lethal control in parts of the nonbreeding range add pressure across the annual cycle. Canadian assessments have likewise documented substantial long-term declines.

My Encounters

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