Sporophila palustris
The Marsh Seedeater, *Sporophila palustris*, is a diminutive and critically endangered passerine, a jewel of the South American grasslands. Males are strikingly patterned, boasting a white collar extending from the chin to the nape, a glossy black crown and upperparts, and warm rufous flanks contrasting with a white belly. Females, in stark contrast, are cryptically dull, a uniform buffy-brown above and paler below, often indistinguishable from other female *Sporophila* species in the field. ...
Primarily inhabits seasonally flooded marshy grasslands, wet savannas, and humid pastures, typically at low elevations (below 500 meters).
Feeds almost exclusively on the seeds of native grasses and sedges, gleaned directly from the seed heads.
Marsh Seedeaters are diurnal, actively foraging during the day and roosting communally in dense marsh vegetation at night. They forage by gleaning seeds directly from the flowering heads of various grasses and sedges, often seen clinging to vertical stems. Males establish small, loosely defined b...
The Marsh Seedeater exhibits a disjunct and highly fragmented range across southeastern South America. Its primary breeding grounds are found in localized, seasonally wet grasslands within northeastern Argentina (Entre Ríos, Corrientes, Formosa, Chaco provinces), southern Paraguay (Ñeembucú, Misi...
Critically Endangered
- The Marsh Seedeater is listed as Critically Endangered, making it one of the most threatened birds in South America. - Males are easily identifiable by their striking black-and-white 'collar' pattern, which gives them a distinctive, almost formal appearance. - Females are notoriously difficult ...