Species: Phalaropus tricolor
Wilson's Phalarope
Species
Encyclopedia of Puget Sound
Classification
Kingdom
Animalia
Phylum
Craniata
Class
Aves
Order
Charadriiformes
Family
Scolopacidae
Genus
Phalaropus
NatureServe
Classification
Other Global Common Names
Falaropo Pico Largo, Pollito de Mar Tricolor - Pisa-n'Água - phalarope de Wilson
Informal Taxonomy
Animals, Vertebrates - Birds - Shorebirds
Formal Taxonomy
Animalia - Craniata - Aves - Charadriiformes - Scolopacidae - Phalaropus - Often placed in monotypic genus STEGANOPUS (AOU 1983). Based on allozyme data, clearly genetically distinct from other phalaropes; may not be part of monophyletic phalarope group (Dittman et al. 1989). However, combined allozyme, morphologic, and mtDNA data suggest that Wilson's phalarope evolved shortly after the phalarope lineage itself arose and that the phalaropes are monophyletic (Dittman and Zink 1991).
Ecology and Life History
Short General Description
A 24-cm shorebird (phalarope).
Migration
false - false - true - Migrates northward through U.S. (mostly over interior prairies west of Mississippi River, uncommon along east coast) mainly April-May (Terres 1980). Migrates regularly through Middle America (September-October and mid-April to late May in Costa Rica), Colombia and Ecuador. Southward migration begins in mid-June (mostly females). The Great Salt Lake (Utah) has the world's largest concentration in fall (500,000-700,000 individuals) (Paton et al. 1992).
Non-migrant
false
Locally Migrant
false
Food Comments
Eats insects (larvae and adults), especially mosquitoes and crane flies. On salt flats may feed on alkali flies, brine shrimps, seeds of aquatic plants. Feeds as it walks along muddy shores, wades in shallow water, or swims in whirls.
Reproduction Comments
In the central and northern Great Plains (Minnesota, Nebraska, and North Dakota), arrives on the breeding grounds from mid-April to early May and departs from mid-August to early September (Roberts 1932, Howe 1972, Johnsgard 1980, Murray 1983). In Alberta, Manitoba, and Saskatchewan, arrives on breeding grounds from late April to early May and is observed until early September (Hohn 1967; Maher 1974; Reynolds et al. 1986; Colwell 1987; Colwell and Oring 1988a,b). Females arrive on the breeding grounds earlier than males (Reynolds et al. 1986, Colwell 1987), and commonly depart from breeding areas earlier than males, usually from early June to early July (Hohn 1967; Howe 1972; Colwell 1987; Colwell and Oring 1988a,b). <br><br>May renest after nest failure, and females are capable of laying multiple clutches (Colwell and Jehl 1994). Polyandry was first documented in Saskatchewan, where a color-banded female laid two clutches with two individual males (Colwell 1986a, Colwell 1987). Philopatry is uncommon, although males return to breeding areas in successive years more often than females (Colwell 1987, Colwell and Oring 1988b). Of 154 adult male phalaropes banded over four years in Saskatchewan, 16 percent returned to their previous breeding area in successive years, whereas only 2 percent of 69 banded adult females returned (Colwell 1987).
Ecology Comments
Reproductive success varies greatly (17-56%); most clutch failures result from predation (Colwell 1992). Exhibits annual variation in nest site selection, moving to deeper, more permanent wetlands in dry years (Hohn 1967, Colwell 1991).
Length
24
Weight
68
Conservation Status
NatureServe Global Status Rank
G5
Global Status Last Reviewed
1996-11-26
Global Status Last Changed
1996-11-26
Other Status
LC - Least concern
Distribution
Conservation Status Map
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Global Range
H - >2,500,000 square km (greater than 1,000,000 square miles) - H - BREEDING: coastal British Columbia, southern Yukon, northern Alberta, central Saskatchewan, central Manitoba, southern Ontario, southern Quebec, northeastern New York, and New Brunswick, south to east-central California, central Nevada, central Utah, eastern Arizona, northern New Mexico, northern Texas, central Kansas, western Nebraska, eastern South Dakota, northern Iowa, northern Illinois, northern Indiana, and northern Ohio. Nonbreeders recorded in summer north to central Alaska, central Mackenzie, northern Saskatchewan, and Nova Scotia (McAlpine et al. 1988, AOU 1998). NON-BREEDING: mainly in saline lakes of highlands of western and southern South America, from Peru, Bolivia, Paraguay, and Uruguay south through Chile and Argentina, casually north to central California, Utah, central New Mexico, southern Texas, southwestern Louisiana, and Florida (Colwell and Jehl 1994, AOU 1998).
Global Range Code
H
Global Range Description
>2,500,000 square km (greater than 1,000,000 square miles)

