Bird species profile

Yellow-winged Blackbird

Agelasticus thilius

Order
Passeriformes
Family
Icteridae

About the species

The Yellow-winged Blackbird is a medium-sized passerine found in wetlands and marshes across southern South America, including Patagonia. Males are glossy black with vivid yellow patches on their wings, while females are brownish with subtler markings. These birds are social, often seen in small flocks, and are known for their loud, metallic calls. During the breeding season, males display their bright wing patches to attract mates and defend territories. Their nests are typically built among reeds or dense vegetation near water. Adaptable and conspicuous, the Yellow-winged Blackbird plays an important role in wetland ecosystems.

Habitat

Prefers freshwater marshes, reed beds, lakeshores, and wet grasslands throughout Patagonia and southern South America.

Foraging

Feeds mainly on insects, seeds, and small aquatic creatures, foraging among reeds and on the ground near water.

Source

Esmoris, A. (2021). Aves de Península Valdés / Birds of Península Valdés: Golfo Nuevo, Golfo San José & Golfo San Matías. First edition.