Silver Teal

Belongs to a group of medium-sized dabbling ducks characterized by an elegant silhouette, measuring approximately 15 to 18 inches (38 to 45 cm) in length and weighing between 11 and 18 ounces (300 to 500 g). Its most striking physical feature is the highly contrasting head plumage, displaying a distinct dark brown to blackish cap that extends below the eyes, creating a sharp boundary with the pale creamy-buff cheeks and throat. The bill is highly diagnostic, presenting a vibrant light blue coloration with a prominent yellow-orange patch at the base of the upper mandible. The body plumage exhibits fine, intricate dark barring on a grayish-white background along the flanks, and a finely spotted breast. In flight, it reveals a brilliant green speculum bordered by narrow white and black stripes. Sexual dimorphism is minimal; males and females look remarkably similar, though males tend to be slightly larger and have slightly brighter bill markings.

Geographical distribution: Occupies a wide geographical range across the southern half of South America. It is commonly found from central and southern Chile and Argentina to the Falkland Islands, extending north through Uruguay, southern Paraguay, southeastern Bolivia, and the southern states of Brazil, particularly Rio Grande do Sul. Two distinct subspecies are currently recognized: Spatula versicolor versicolor, which is smaller and populates the northern parts of the range, and Spatula versicolor fretensis, a larger subspecies adapted to the harsher climates of Patagonia and Tierra del Fuego.

Habitat: Inhabits a diverse array of freshwater wetland environments, showing a strong preference for shallow, calm waters. It is frequently observed in freshwater lagoons, shallow ponds, marshes, swamps, and temporary pools that support a rich density of emergent aquatic vegetation such as reeds and rushes. These plants provide vital nesting sites and protective cover from predators. While primarily associated with continental inland waters, it can also utilize brackish lagoons and coastal estuaries during dry seasons or winter migrations.

Feeding: Exhibits an omnivorous and opportunistic feeding behavior, foraging primarily by dabbling and filtering. Utilizing the specialized comb-like lamellae on the edges of its bill, it filters organic material, seeds, and small organisms from the water and soft mud. Its diet consists of aquatic plant seeds, delicate vegetative parts, algae, and a variety of small invertebrates, including aquatic insects, larvae, small mollusks, and crustaceans. It typically feeds in shallow waters, swimming slowly with its head partially submerged or tipping up to reach the benthos.

Behavior: Displays a generally peaceful and non-aggressive temperament, typically seen in pairs or small family groups. Outside of the breeding season, it may gather in larger communal flocks, often associating with other duck species. Populations breeding in the southernmost reaches of Patagonia are migratory, traveling northward during the austral winter to escape freezing temperatures and find ice-free wetlands. It is an agile and fast flyer, recognizable by the steady, rapid wingbeats that produce a faint whistling sound. It is also an excellent swimmer that prefers to evade threats by hiding in thick shoreline vegetation rather than diving.

Nesting: Commences its breeding cycle in the early spring, marked by elegant courtship displays on the water. It constructs its nest directly on the ground, carefully concealed within dense grass, reeds, or low shrubs close to the water´s edge. The nest is a shallow depression lined with grass, leaves, and a generous layer of soft down feathers plucked from the female´s breast to insulate the clutch. The female lays 6 to 10 cream or pale-buff eggs. Incubation is performed solely by the female and lasts about 24 to 28 days. However, the male remains close by to help defend the nesting territory and assist in rearing and protecting the precocial ducklings once they hatch.

Conservation status: Classified as Least Concern (LC) on the IUCN Red List of Threatened Species. While the global population is considered stable and possesses an expansive distribution range, localized populations face persistent environmental pressures. The primary threats include habitat loss and wetland degradation caused by agricultural expansion, water pollution from pesticide runoff, and localized pressures from recreational hunting in certain South American countries.