Bank Swallow

How to find it

Scan the coast during migration, because big numbers pass over coastal areas such as Cahuita. Look for it feeding in flight over or near water, even on migration. It often mixes with other swallows, so go through each flock slowly and check for the dark chest band. Watch the lower layer of a flock, since it often flies lower than Barn and Cliff Swallows. Fresh-cut grass, harvested fields, ponds and marshes can hold birds that have stopped to feed.

How to recognise it

Look for these marks:

- Size: small, about 11.5 cm long.

- Throat: white.

- Chest: a distinct dark band across it.

- Upperparts: grayer than the rough-winged swallows of the genus Stelgidopteryx.

The chest band is the mark that sets it apart. Add the small size and the quick, jerky flight, and you have the combination that separates it from the Tree Swallow, Cliff Swallow and House Martin. Faster wingbeats than a rough-winged swallow are another clue when a mixed flock sweeps past.

What it sounds like

Recording: Susan Marley, CC BY 4.0, source, read 4 Nov 2026.

Behaviour and diet

It eats almost only insects caught in flight, so you will nearly always see it on the wing. It is sociable and often travels in flocks with other swallows. In Costa Rica it migrates with Barn and Cliff Swallows and often flies lower than they do.

The flight is fluttery and fast with short glides, and the bird changes course often while chasing insects.

Where it lives

In Costa Rica it is an abundant fall migrant through the lowlands of both slopes, especially along both coasts. It reaches up to about 1500 m in the Central Valley and is rare inland.

Migrants stop where food is plentiful: freshly harvested fields, newly cut grass, pastures, ponds and marshes. In winter it is mainly near marshes and flooded pastures.

When to see it

The fall passage runs from late August or early September until early November. A second passage in spring is abundant along both coasts from early March to mid May.

Similar birds

The Northern Rough-winged Swallow is warmer brown with a dusky throat and no brown breast band, and the Bank Swallow is smaller with faster wingbeats. A female Purple Martin, another migrant through Costa Rica, lacks the crisp dark bar across the upper chest that the smaller Bank Swallow shows. The Brown-chested Martin, a South American species, has a dark chest band too but is larger, and it has had no verified reports in Costa Rica in about 30 years.

Names and lore in Costa Rica

Costa Ricans use Golondrina Ribereña, and the plain name Golondrina also appears in the Costa Rican field guide entry. Another Spanish name is avión zapador. The Latin genus name Riparia refers to river banks, where it digs its nest burrows.

Status and conservation

The AOCR list marks it as a migrant (M), and globally it is Least Concern with a large and widespread population.

Photography tips

On migration, flocks of several hundred mixed with other swallows can gather at roost sites such as tall grasses, bushes, trees and wires near places rich in insects. Perched birds are far easier to study than fast fliers.