Andarríos Maculado

Identificación

Adults have short yellowish legs and an orange bill with a dark tip. The body is brown on top and white underneath with black spots. These spots vary in degree over the course of spotted sandpipers' lives, becoming especially prevalent around the breeding season. The overall health of spotted sandpipers may be suggested by the "spottiness" of an individual. Generally, females with more "spottiness" were healthier than those who did not have as many spots. The condition of males based on the amount of spots they exhibit is yet to be determined. Additionally, spot size gets smaller and the spot shape becomes more irregularly shaped as age increases. Spotted sandpipers also feature a white supercilium.<p>Non-breeding birds, depicted below, do not have the spotted underparts, and are very similar to the common sandpiper of Eurasia; the main difference is the more washed-out wing pattern visible in flight and the normally light yellow legs and feet of the spotted sandpiper. The Actitis species have a distinctive stiff-winged flight low over the water. They also have a distinctive walk in which their tails bob up and down. Males and females exhibit similar physical measurements, but differ in weight; females tend to be about 20-25% heavier than males.<p>Measurements:

Taxonomía

The spotted sandpiper was formally described by the Swedish naturalist Carl Linnaeus in 1766 in the twelfth edition of his Systema Naturae under the binomial name Tringa macularia. The type locality is Pennsylvania. The species is now placed together with common sandpiper in the genus Actitis and was introduced in 1811 by the German zoologist Johann Illiger. The genus name Actitis is from the Ancient Greek aktites meaning "coast-dweller" from akte meaning "coast". The specific epithet macularius is Latin meaning "spotted". The species is monotypic: no subspecies are recognised.

Nombre científico

Actitis macularius

Autoridad

(Linnaeus, 1766)

Orden

Charadriiformes

Familia

Escolopácidos

Género

Actitis

Distribución y hábitat

Spotted sandpipers are a philopatric species. Their breeding habitat is near fresh water across most of Canada and the United States. They migrate to the southern United States, the Caribbean, and South America, and are very rare vagrants to western Europe. These are not gregarious birds and are seldom seen in flocks. Spotted sandpipers are the most widespread species of their kind in North America due to their high breeding rates and their ability to adapt to various environmental pressures.

Área de cría

NA : widespread, low Arctic to temperate inland waterbody margins of Nearctic: Aleutian Is., Alaska mainland except North Slope, Canada (except far n and Arctic Arch.) to Newfoundland, s to sw, ec USA

Área no reproductiva

temperate to tropical coastal and inland waterbody margins of Western Hemisphere: s USA and Caribbean through South America (except far s), including Bermuda, the Azores (n Macaronesia, nw of n Africa), main Hawaiian Is. and Galapagos

Migración

Migrantes completos

Comportamiento

Patrón migratorio: Migrantes completos.

Conservación

Tendencia poblacional: en declive.

Tendencia poblacional

en declive