Diamantina Sabrewing

Scientific name: Campylopterus diamantinensis

The Diamantina Sabrewing is a localized hummingbird restricted to high-elevation rocky grasslands and scrub in southeastern Brazil. The number of mature individuals is unknown, the population is believed to be decreasing, and it is listed as Near Threatened, monotypic, non-migratory, and endemic to a very small region of Brazil’s Espinhaço Range.

At a Glance

• Family: Trochilidae (hummingbirds)

• Clade: Trochilini – Emeralds

• Genus group: Campylopterus — 10 species, 6 subspecies

• Range: Endemic to southeastern Brazil, mainly in the Espinhaço Range of Minas Gerais, including the Diamantina Plateau and nearby highland areas.

• Habitat: High-altitude “campos rupestres” (rocky montane grasslands and scrub) and adjacent dry forests and bushy slopes with scattered shrubs and small trees.

• Elevation: Mostly above 1,000 m, in highland habitats of the Espinhaço Range.

• Length: Medium-sized sabrewing, roughly 11–13 cm.

• Weight: About 7–8 g.

• Number of mature individuals: Unknown

• Population trend: Decreasing

• Status: Near Threatened (IUCN)

Name Origin
The genus name Campylopterus comes from Greek words meaning “curved wing,” referring to the thickened, sabre-shaped outer primaries that characterize sabrewings. The species name diamantinensis refers to the Diamantina region of Minas Gerais, Brazil, where this species occurs in highland “campos rupestres.” The English name “Diamantina Sabrewing” combines this regional reference with its sabrewing affiliation.

Subspecies & Distribution
The Diamantina Sabrewing is monotypic, with no recognized subspecies.

Endemic to southeastern Brazil, it is confined to high-elevation areas of the Espinhaço Range in Minas Gerais, especially the Diamantina Plateau and nearby rocky mountaintops and ridges. Within this range, it occupies patches of “campos rupestres” and adjacent scrub and dry forest.

Overall, the species has a very small, fragmented range limited to a handful of highland massifs in the Espinhaço Range, with no known populations outside this region.

Ledged
Green Resident

Species Overview
The Diamantina Sabrewing is a recently recognized Brazilian endemic in the Campylopterus largipennis complex, split based on distinct morphology, vocalizations, and habitat use. It is a highland specialist of rocky grasslands and dry montane scrub, where it forages among scattered shrubs and low trees. Its tiny range, fragmented habitat, and ongoing threats from fire, grazing, and land-use change have led to its Near Threatened status and concern that further habitat loss could push it toward a higher threat category.

Male Description
Adult males are medium-sized sabrewings with the characteristic thickened outer primaries of the genus. They have dark green upperparts with a bronzy sheen and a contrasting, somewhat paler throat and underparts that show greenish or bluish iridescence depending on light. The tail is relatively long and dark, often with subtle color gloss, and the bill is long and slightly decurved, adapted to flowers of their rocky highland habitats. Overall, males present as dark, robust hummingbirds with strong wings and a subdued but rich metallic sheen.

Female Description
Females are similar in size and basic structure but somewhat duller, with more cryptic, greenish-brown tones on the upperparts and paler, less iridescent underparts. The tail is dark with less obvious gloss than in males, and the sabre-like outer primaries are present but less conspicuous in the field. As with many sabrewings, the female’s coloration provides camouflage in the shrubby and grassy highland habitats where she forages and nests.

Habitat & Behavior
Diamantina Sabrewings inhabit high-elevation “campos rupestres” ecosystems, characterized by rocky outcrops, montane grasslands, and scattered shrubs and small trees, along with adjacent dry forests and scrub. They feed on nectar from flowers of shrubs, herbs, and small trees adapted to these rocky, nutrient-poor soils, often visiting a circuit of flowering plants rather than defending a single patch. They also capture small arthropods to supplement their diet, gleaning from foliage or hawking insects in short sallies. The species is considered resident within its restricted highland range and is not known to undertake long-distance migrations, though local movements within and between mountaintops are likely.

Population
The total number of mature Diamantina Sabrewings is unknown, but the species is considered uncommon within its very small and patchily distributed range. Its habitat is naturally fragmented across mountaintops and ridges and is further affected by human activities such as burning, grazing, mining, and development. These factors are believed to be causing a gradual decline in its population, even though precise quantitative data are lacking.

Conservation
Diamantina Sabrewing is listed as Near Threatened because of its restricted highland range, small and fragmented habitat, and suspected decreasing population. Key threats include habitat degradation and loss from frequent fires (both natural and human-set), overgrazing, mining, tourism-related development, and other land-use changes in the “campos rupestres” and adjacent dry forests of the Espinhaço Range. Conservation measures should focus on protecting and managing high-altitude rocky grasslands and scrub, controlling fire and grazing pressures, and safeguarding remaining natural vegetation on the Diamantina Plateau and surrounding massifs. Continued surveys and monitoring are needed to better estimate its population size, understand its ecology, and detect any changes in range or abundance.

Related species in the Campylopterus genus (10 species total):

Please note: The content provided in this article reflects Anthony’s personal experience and photographic approach. Results can vary depending on light, weather, location, equipment, subject behavior, and field conditions.