Brown-chested Martin

How to find it

Look over open country near water, such as pastures, wetlands and farmland. Scan fence lines, utility wires and bare branches with binoculars. Check mixed flocks of swallows for the brown chest band, which is the quickest way to pick this bird out. Low, cruising flight over water or fields is a good clue. Records here are very few, so any bird you find is a bonus rather than something to expect.

How to recognise it

This is a dull martin, and that is the clue.

Upperparts: gray-brown. Underparts: mostly white, with a broad gray-brown chest band that forms a V reaching down the breast. A fine line of small brown spots lies just below the band.

Size: 16 to 18 cm long, weighing 30 to 40 g. Males and females look alike, and the tail is slightly forked. White shows on the sides of the tail in flight.

It is the only martin in its region without blue gloss, so it looks matte rather than shining.

The southern race, fusca, is the one that reaches Costa Rica and Panama. It is larger and darker, with a sharper breast band. In a vagrant seen far to the north, dusky marks down the center of the breast below the band identified this race.

What it sounds like

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

Behaviour and diet

It usually flies low with bowed wings and catches insects in flight. Birds often cruise low over water or fields and perch on wires or exposed branches.

A vagrant seen in Massachusetts held its wings in a downward V while gliding, which made its flight look different from other swallows. In the south it does not build its own nest and instead uses old nests of the Rufous Hornero.

In migration and on its winter range it forms huge flocks that can exceed 100,000 birds.

Where it lives

Across its range the Brown-chested Martin uses dry savanna, seasonally flooded lowland grassland, rivers and heavily degraded former forest. These are open places with plenty of sky for hunting insects.

In Costa Rica it is only an occasional visitor from the south. It is found regularly in Panama and in nearly all mainland South American countries, but here it arrives as a stray.

When to see it

The southern-breeding race reaches Costa Rica and Panama during the austral winter, when South American breeders move north. It is present in its southern breeding areas from September to April.

Similar birds

In Costa Rica the other martin is the Gray-breasted Martin (Martín Pechigris), the only martin seen regularly here. The Brown-chested lacks blue gloss and has a brown chest band, so it is dull brown above. A Costa Rican birding article says the dark chest band and overall color make it look like a large Bank Swallow, a migrant from North America. Other swallows are smaller.

Names and lore in Costa Rica

Costa Rica's official Spanish name is Martín de Ríos. Other Spanish names across its range include golondrina parda, golondrina sabanera and martín de los ríos. Panama and Ecuador use Martín Pechipardo, and Mexico uses Golondrina Pecho Café.

Status and conservation

The official Costa Rica list shows this martin as a migrant, while the IUCN lists the species as Least Concern, last assessed in 2019.

Photography tips

Wires and exposed branches over open country near water are where perched birds show best, so scan those with binoculars. Low cruising flight over fields or water is the other chance to spot one.