Purple Martin

How to find it

Head for the Caribbean coast, where passage can be common to abundant in some years. Scan flocks of a single species high in the sky, because migrating martins fly higher than other swallows except in bad weather. Look over open areas for lone birds. Check phone lines and trees at dusk, when flocks sometimes come down to sleep. Check flocks of Gray-breasted Martins too, since lost birds may join them.

How to recognise it

This is a large swallow, about 17 cm long.

The adult male is entirely dark, glossy purple-blue, with blackish wings and tail. He is unmistakable.

The female is duller above, with pale-tipped brownish feathers on the forehead, neck and chest. Her lower breast and belly are whitish to grayish buff, and her bill and legs are black.

A juvenile with white underparts was photographed on a wire at the Angostura hotspot near Turrialba in 2021. Females and young birds deserve the closest look, because they can resemble the resident Gray-breasted Martin.

What it sounds like

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

Behaviour and diet

Migrating martins tend to fly higher than other swallows, except in bad weather. They often travel in flocks of their own species, and they eat insects.

Migrating flocks sometimes come down at dusk to sleep on phone lines or in trees, especially in bad weather.

Lost birds that wander inland may join flocks of Gray-breasted Martins. They are more often seen alone, usually over open areas.

Where it lives

In Costa Rica the Purple Martin is not tied to any one habitat or plant community, and in a single day it can visit several habitats. That suits a bird that is only passing through.

It is irregularly common to abundant along the Caribbean coast. Inland it is rare and sporadic, and on the Pacific coast it is seen mostly in autumn. A stray has also been reported in autumn on Isla del Coco National Park. Around Turrialba it is quite uncommon.

When to see it

It passes through in autumn, from August to mid-October, and again in spring, from late January to April. On the Pacific side the few records fall mostly in September and October.

Similar birds

Gray-breasted Martin is the only martin seen regularly in Costa Rica, and it is the one to compare. It is smaller, has steely-blue upperparts and always looks mostly white below. Only the female Purple Martin is likely to be mistaken for it, and telling the two apart can be very hard.

Names and lore in Costa Rica

Costa Rican sources list the Spanish names Martín Purpúrea and Golondrón. Other Spanish names include Golondrina Purpúrea and Golondrina Azulnegra.

Status and conservation

The AOCR list marks it as a migrant (M), and North American numbers fell by about 37 percent between 1966 and 2016.

Photography tips

Lone birds over open areas and flocks settled on phone lines at dusk are the most approachable chances. Wires near Turrialba produced a photographed juvenile in 2021.