- Dubois's Seedeater
 - Dubois's Seedeater
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Dubois's Seedeater Sporophila ardesiaca Scientific name definitions

Alvaro Jaramillo
Version: 1.0 — Published March 4, 2020
Text last updated January 1, 2011

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Introduction

It has been suggested that this southeast Brazilian endemic is either a hybrid swarm between Yellow-bellied Seedeater (Sporophila nigricollis) and Double-collared Seedeater (Sporophila caerulescens), or alternatively a localized color morph or variant of the first-named species. Certainly, its plumage somewhat resembles one or both, or is intermediate between them. Males have the mantle grayish with a black hood contrasting with the white rear underparts. Females are presumably indistinguishable from those of Yellow-bellied Seedeater at least. Males conforming to this description have been found to at least 800 m in the states of Bahia, Espírito Santo, Minas Gerais, and Rio de Janeiro, usually in areas of scrub and grassy vegetation, much like those occupied by other, similar seedeaters.

Field Identification

11 cm. Male has head to nape and down to breast black, upperparts greyish, inconspicuous darker streaking on back; upper­wing and tail brownish, upperwing-coverts and tertials widely fringed greyish (like back); black of breast stops abruptly and neatly, rest of underparts white, often with blurred dark spotting on sides and flanks, wing-linings white; iris dark brown; bill blue-grey; legs blackish. Female is nondescript, warm buffy brown on crown, nape and upperparts, wings and tail similarly buff-brown; below, throat and breast similar warm buff-brown, hardly contrasting with face, this colour extending to flanks and contrasting with paler buff belly and vent; crissum darker than belly, similar to flanks; bill dusky. Juvenile apparently undescribed.

Systematics History

Taxonomic status not clearly understood: seems to be very closely related to S. nigricollis, possibly conspecific and perhaps even a morph (songs reported as essentially identical); supposed ranges of the two apparently overlap broadly, and they have syntopic breeding distributions. Unsampled in recent molecular studies; research clearly required. Monotypic.

Subspecies

Monotypic.

Distribution

SE Brazil in extreme SE Bahia, Espírito Santo, extreme E Minas Gerais and Rio de Janeiro, also Goiás (1).

Habitat

Shrubby and grassy clearings, and roadsides; sea-level to 800 m.

Movement

Sedentary.

Diet and Foraging

Diet largely grass seeds. Forages mostly while clinging to grass stem. Found in small flocks, not uncommonly with S. nigricollis.

Sounds and Vocal Behavior

Song a loud and melodious warble with some doubled notes and an accented or different ending, “tweew-tweew, chu-chu, tweeta-cheww-pheeeééé”; apparently similar to, if not identical to, that of local populations of S. nigricollis. Call a high-pitched “tiip”.

Breeding

No information.
Not globally threatened. Uncommon to locally common; rather poorly known. Research required in order to confirm this seedeater’s taxonomic status, enabling appropriate conservation management to be determined.

About the Author(s)

Alvaro began birding as an 11 year old in Canada, and eventually trained in Evolutionary Ecology studying, creatures as varied as leaf-cutter ants and Argentine cowbirds. But his career has been focused on birding tourism, both as a guide and owner of his tour company, as well as a avitourism consultant to various organizations. He is the author of Birds of Chile, New World Blackbirds: The Icterids, as well as the ABA Field Guide to the birds of California. He lives in Half Moon Bay, California where he is known for his pelagic birding trips. Email: alvaro@alvarosadventures.com.

Distribution of the Dubois's Seedeater - Range Map
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Distribution of the Dubois's Seedeater

Recommended Citation

Jaramillo, A. (2020). Dubois's Seedeater (Sporophila ardesiaca), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.dubsee1.01
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