Blue-winged Teal

Overview

The blue-winged teal (Spatula discors) is a small, fast-flying dabbling duck, one of the first migratory waterfowl to arrive in the Neotropics each autumn and one of the last to leave. The name comes from the powder-blue forewing patch, vivid in flight. Breeding males have a distinctive white facial crescent in front of the eye; females and non-breeding males are cryptic brown.

At 28–38 cm and 280–410 g, these are compact ducks that rocket off the water at the first disturbance. They feed by dabbling at the surface — tipping forward with tail up — on aquatic invertebrates, seeds, and plant material. On their wintering grounds, insects and invertebrates dominate the diet.

Why Tortuguero

Tortuguero’s canal-lagoon system provides the shallow, vegetated margins that blue-winged teals prefer for wintering. The park sits on the Caribbean migratory flyway, and the combination of calm water, abundant invertebrates, and low hunting pressure makes it reliable wintering habitat. Flocks arrive in October and use the same waterbody sections — particularly the quieter backwaters — throughout the season. For a birder visiting between November and March, the species is reliably present and close.

How to see them (honestly)

• Morning canal tours (6–9 AM) give the best light and the least boat traffic — teals flush readily from motor wash.
• Look on calm, open stretches of water and where aquatic vegetation meets open surface; they feed at edges.
• The blue wing-patch is unmistakable in flight — a bright cerulean flash from forewing to body.
• In mixed duck flocks, scan for the smaller, rounder body shape compared to any Muscovy or comb duck present.
• By April the birds are restless — flocks consolidate and depart relatively quickly.

Status note

The IUCN lists blue-winged teal as Least Concern with a large and stable global population estimated in the tens of millions. The species is abundant enough that it supports regulated hunting in the United States and Canada. No conservation concern at Tortuguero; the local challenge is simply ensuring calm, low-disturbance winter habitat is maintained on the main canal system.