Birds Active during the day

Black-breasted Puffleg

Eriocnemis nigrivestis

iNaturalist eBird Wikipedia

One of the rarest gems of the Andes, the Black-breasted Puffleg is a Critically Endangered hummingbird found only on a handful of Ecuadorian volcanic slopes. Famous for its velvety black feathers and snowy-white 'boots,' this elusive bird is a holy grail for wildlife watchers.

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Quick Identification

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Size

Length: 8-9 cm (3.1-3.5 in); Weight: 4.3-4.6 g (0.15-0.16 oz)

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Colors

Males are velvety black with iridescent purple-blue throat and belly patches; females are bronzy-green above with golden-green underparts. Both have signature white leg puffs.

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Key Features

Velvety black plumage with iridescent purple-blue patches (males)
Distinctive white 'boots' or leg puffs at the base of the thighs
Short, straight black bill
Forked tail with dark blue-black feathers

When You’ll See Them

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Activity pattern Active during the day

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Peak hours 7-10 AM, 3-5 PM

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Season Year-round

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Diet Primarily nectar from tubular flowers (Ericaceae and Melastomataceae) and small insects caught mid-air.

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Habitat High-altitude humid montane forests, elfin forests, and páramo-forest ecotones.

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Where Does the Black-breasted Puffleg Live?

This ultra-rare hummingbird is endemic to the high-altitude slopes of the Andes in northern Ecuador. Its extremely limited range is confined almost exclusively to the Pichincha volcano complex and the Atacazo volcano, making it one of the most geographically restricted birds in the world. It exists only in small, fragmented pockets of pristine cloud forest, with no populations found outside of this tiny Ecuadorian corridor.

Basemap © OpenStreetMap contributors

1 Countries

80 km² Range

Critically Endangered Conservation

EC Ecuador

Marginal

Elevation range

0 m1,000 m2,000 m4,000 m

2,800 m – 3,500 m

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iNaturalist / Verified observation data

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Behavior

The Black-breasted Puffleg is a spirited and highly territorial hummingbird known for its remarkable agility in the thin air of the Andes. These birds are often solitary, vigorously defending specific floral patches or nectar sources from other hummingbirds. While they are small, their presence is commanding as they dart between high-altitude shrubs, their white leg puffs flashing like tiny beacons against their dark bodies.

Feeding behavior involves a mix of 'trap-lining'—visiting a routine circuit of flowers—and territorial guarding. They are generally elusive and sensitive to human presence, though they may visit established nectar feeders in specialized eco-lodges or conservation stations within their very narrow range. Their social interactions are mostly limited to brief, intense chases during the breeding season or disputes over feeding rights.

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Camera Tips

Capturing the Black-breasted Puffleg on camera requires extreme precision due to its rarity and high-altitude habitat. Position your AI-powered camera at eye level with native tubular flowers like Macleania or Cavendishia. Because these birds are 'trap-liners,' they follow specific routes; once you record a sighting, leave the camera in that exact spot, as they are likely to return at the same time the following day.

A fast shutter speed or high frame rate (at least 60fps) is essential to freeze the rapid wingbeats and distinct white leg puffs of this species. Since light levels in the Ecuadorian cloud forest can be low and misty, ensure your camera has a high-quality sensor capable of handling low-light conditions without losing the iridescent details of the male's black plumage. Avoid using heavy flashes, as these can startle the bird and disrupt its feeding pattern.

If you are setting up a camera near a feeder in a known conservation area, place the camera approximately 3 to 5 feet away to capture the bird's full profile. Angle the camera slightly upward to catch the blue-purple iridescence on the throat and belly, which only reveals itself at certain angles. Given the misty climate, a weather-proof housing or a protective 'roof' for the camera is mandatory to prevent lens fogging and moisture damage.

Similar Species

Species that look similar or are commonly confused with Black-breasted Puffleg.

Sapphire-vented Puffleg

Has bright green upperparts and blue undertail coverts, unlike the nearly all-black male Black-breasted Puffleg.

Golden-breasted Puffleg

Larger with distinct golden-bronze plumage and a much broader geographic range across the Andes.

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Frequently Asked Questions

The Black-breasted Puffleg is most active in the early morning shortly after sunrise (around 7-9 AM) and again in the late afternoon. These peak periods coincide with maximum nectar production in their favorite high-altitude flowers.

Unless you live on the high slopes of the Pichincha or Atacazo volcanoes in Ecuador, you won't find them in your backyard. However, for those in their range, planting native high-altitude shrubs like Ericaceae and keeping nectar feeders clean is the best method.

They are nectar specialists, feeding on the flowers of high-altitude plants. They also eat tiny insects and spiders to get necessary protein, especially during the nesting season.

No, they are extremely rare and restricted to primary cloud forests and high-elevation shrublands. They generally avoid urbanized areas, though they may visit quiet, garden-filled eco-lodges near their natural habitat.

The male Black-breasted Puffleg is almost entirely black, whereas the Sapphire-vented Puffleg has a distinct green back. Additionally, the Black-breasted male has a unique purple-blue patch on the throat and belly that the Sapphire-vented lacks.

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