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Rosy-billed Pochard

A species of Red-crested Pochard and Allies, Also known as Rosybill
Scientific name : Netta peposaca Genus : Red-crested Pochard and Allies

Rosy-billed Pochard, A species of Red-crested Pochard and Allies
Also known as:
Rosybill
Botanical name: Netta peposaca
Genus: Red-crested Pochard and Allies
Rosy-billed Pochard (Netta peposaca) Photo By Dick Culbert , used under CC-BY-2.0 /Cropped and compressed from original

Description

Like many other members of family Anatidae, the rosy-billed pochard exhibits significant sexual dimorphism. Males have a purplish-black head, neck and breast with gray sides, a white area on the crissum (the area around the cloaca), and a bright red bill and red eyes. The bill has a large rounded knob, which is bright red, and rest of the bill gradually fades towards a pale pink before ending with a black tip. The rounded knob of the bill increases in size and intensity in colour during the mating season. When in flight, the mostly dark plumage noticeably contrasts with the white primaries and secondaries. The legs and feet are yellow to orange. On the other hand, females are dull and brown. The bill is bluish-gray with a black tip and the legs are yellow-orange to gray. The contrasting white crissum is the most noticeable feature on females. Young are almost identical in appearance to the females, but their underparts are darker. Rosybill adults lack the dull eclipse plumage that is characteristic of northern individuals of the genera Aytha and Anas. Males tend to be slightly larger than females, but in general both sexes are very similar in terms of body size. Adults can grow to about 22 inches (56 cm) in length and weigh 2.2-2.6 pounds (1-1.2 kg). Despite these pochards being strong fliers, their blunt-tipped wings require a faster wing-beats than that of many ducks and they have some trouble taking off. They do not walk as well on land as other dabbling ducks because their legs are placed further back on their bodies to help propel them when underwater. Their minimum wingspan recorded is 72 cm, while the maximum is 84 cm.
Size
56 cm
Feeding Habits
Rosy-billed Pochard predominantly consume seeds like knotgrass for carbohydrate-rich energy, essential for thermoregulation. Omnivorous, their diet also includes roots, aquatic plants, and occasional animal matter. Rosy-billed Pochard dabble, rarely dive, showing adaptability in feeding methods and food sources.
Habitat
Rosy-billed Pochard typically inhabits shallow freshwater systems such as swamps, marshes, and small lakes with abundant floating vegetation, often on low ground. These environments are found across broad geographical regions that include but are not limited to subtropical or temperate zones. The species also adapts to more open or deeper waters, especially during the moulting period, and may frequent agricultural fields like rice paddies for feeding. Altitudinal range extends up to approximately 1000 meters, such as in parts of Patagonia. Seasonal migrations are dictated by water availability, which is influenced by the dry and wet cycles of their habitats.
Dite type
Herbivorous

General Info

Behavior

Rosy-billed pochards are highly sociable ducks and may congregate in flocks of thousands of individuals.

Distribution Area

Rosy-billed pochards nest within tall grasses in wetlands, mainly in areas that extend from the central provinces of Córdoba, Sante Fe, Entre Ríos, and Buenos Aires, southwards to Río Negro. Individuals are also found in shallow freshwater swamps, marshes and small lakes. They are a fully migrant species and their movements are heavily associated with water conditions. Seasonal dry periods are common in central Argentina and they force birds to move towards larger water areas in late summer. By early fall, these areas are often dry and individuals are forced to move to find more water and better food sources elsewhere. An increase in population size can be seen during wet periods.

Species Status

Current population trends show that populations are increasing and are not severely fragmented. There is currently no action recovery plan, however there is a systematic monitoring scheme in place. Conservation sites exist across the entire range of rosybills and they occur in at least one protected area.
Rosy-billed Pochard (Netta peposaca) Rosy-billed Pochard (Netta peposaca) Photo By Dick Culbert , used under CC-BY-2.0 /Cropped and compressed from original

Scientific Classification

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