Red Phalarope

This medium-sized shorebird measures between 20 and 22 cm in length with a wingspan of 37 to 41 cm, characterized by a striking reverse sexual dimorphism where females are larger and much more brightly colored than males. During the breeding season, adults exhibit a rich reddish-chestnut underbelly, which contrasts sharply with prominent white cheek patches, a dark crown, and a relatively stout, yellow bill with a black tip. Conversely, the non-breeding winter plumage is dominated by a clean pale gray back and white underparts, with a diagnostic dark patch behind the eye, making the bird resemble a miniature gull. Their toes are equipped with prominent lateral lobes that make them exceptionally strong swimmers, a highly unusual morphological adaptation for a typical shorebird.

Geographical distribution: It has a circumpolar breeding range across the high Arctic latitudes, nesting in northern Alaska, the Arctic archipelago of Canada, coastal Greenland, Svalbard, and the northernmost coastlines of Siberia. After the nesting season, it undergoes an extensive and highly pelagic migration toward the Southern Hemisphere to spend the winter in nutrient-rich oceanic upwelling zones, concentrating heavily off the western coast of South America in the Humboldt Current and off southwestern Africa in the Benguela Current.

Habitat: During the nesting season, it occupies wet Arctic tundra, choosing low-lying areas near freshwater ponds, marshes, peatlands, and shallow coastal lagoons. For the remainder of the year, its habitat shifts completely to the open ocean, where it lives a pelagic existence along continental shelves and marine upwelling zones where deep, nutrient-filled currents meet the surface, rarely coming close to land unless forced shoreward by severe oceanic storms.

Feeding: Its diet changes significantly according to the season. On their Arctic nesting grounds, they feed primarily on terrestrial and freshwater invertebrates, particularly aquatic insect larvae, beetles, spiders, and small mollusks. In their marine environment during the non-breeding season, they consume pelagic zooplankton, focusing their feeding efforts on copepods, amphipods, krill, and tiny fish larvae near the ocean´s surface.

Behavior: It displays a highly specialized and fascinating foraging behavior, spinning in rapid circles on the water´s surface to generate a miniature vortex, which draws small invertebrates upward through the water column within easy reach of its bill. This species is also famous for its reversed sexual roles; females are highly territorial, courting multiple males and defending nesting territories, often practicing polyandry by leaving the first clutch to find another mate.

Nesting: The nest is a shallow scrape on the damp ground of the tundra, typically concealed within sedges and lichens and lined with dry grasses and leaves. The female typically lays a clutch of four olive-green eggs blotched with dark brown for camouflage. Immediately after laying, the female leaves the nest to find other partners, leaving the male to incubate the eggs alone for 18 to 24 days and care for the precocial chicks until they fledge.

Conservation status: It is currently listed as Least Concern (LC) on the IUCN Red List, owing to its vast geographical range and large global population. However, the species is vulnerable to the long-term effects of climate change, which is rapidly altering the fragile Arctic tundra habitat through shrub encroachment and melting permafrost, as well as ocean pollution from oil spills and microplastic ingestion in its key pelagic wintering areas.