Nature Field Guide
Willet
- Spanish name
- Pigüilo o playero aliblanco
- Scientific name
- Tringa semipalmata
What Do Pico & Tati Think?
Pico sees a plain gray shorebird. Tati learns that a bird can reveal a surprising pattern when it takes flight on its own.
Species overview
About the Willet
A Willet has a sturdy straight bill and long grayish legs. Nonbreeding plumage is fairly plain, making shape useful when the bird is standing. Flight reveals striking black-and-white wings. It feeds on small coastal animals along shorelines. Never flush a resting bird to expose a field mark; a patient observer can wait for natural movement.
Identification
Key Features of the Willet
Sturdy long straight bill
Long grayish legs
Plain gray nonbreeding body
Bold black-and-white wings in natural flight
Habitat & range
Scan exposed shoreline feeding areas and nearby resting places with binoculars. The tide changes which flats are available; remain on a safe established route.
Local observations
Mostly a Pacific coastal migrant and nonbreeding visitor using mudflats, estuaries and shorelines. Less numerous on the Caribbean. Inland appearances are unusual and do not justify a blanket inland-region assignment. Oceanic Pacific: accidental visitor in the official Isla del Coco checklist, rather than ordinary year-round habitat.
When to observe
For migratory shorebirds, November–March is the broad nonbreeding observation window in Costa Rica, with southbound passage mainly August–October and northbound passage April–May. Individual species and sites vary; some birds remain outside these months. Check current local observations and the tide.
Conservation & care
Give feeding and resting birds space. If a bird stops feeding, repeatedly looks at you or moves away, increase your distance. Keep dogs away from flocks, avoid playback and feeding, and leave nests and natural shoreline debris undisturbed.
Observation activity
Compare the standing outline with a flight reference. List clues you can use without disturbing a bird.
Explore by location
Caribbean · Central Pacific · Guanacaste · Oceanic Pacific · Puntarenas & the Gulf Islands · South Pacific