The Sombre Hummingbird (*Aphantochroa cirrochloris*) is a strikingly understated jewel of eastern Brazil’s Atlantic Forest, defying the typical iridescent flash of its family with a plumage of deep, dusky olive-green and gray. Its most unique characteristic is its unusually large, slightly curved bill, which it uses to probe the long-tubed flowers of bromeliads and heliconias, a specialization that distinguishes it from more generalized hummingbirds. Lacking the gorget or bright crown of its relatives, the male’s subdued appearance is offset by a subtle, coppery sheen on the tail and wings, while both sexes share a pale, whitish line above the eye. A special feature is its remarkably low, buzzing call and a hovering style that is slower and more deliberate, almost moth-like, as it meticulously works a patch of blooms. This somber, efficient forager plays a vital role as a specialist pollinator in its dense, humid habitat, proving that not all hummingbirds need to be flashy to be fascinating.

Faits amusants

Despite its somber name and dull olive-gray plumage, the Sombre Hummingbird has a surprisingly aggressive streak, often chasing away much larger birds like toucans from its feeding territories. Unlike most hummingbirds that rely on hovering, it frequently perches to feed, using its slightly decurved bill to extract nectar from tubular flowers with minimal energy expenditure. A quirky behavior is its habit of sunbathing on exposed branches, spreading its wings and fluffing its feathers to absorb warmth, an unusual sight for a bird typically associated with dense, shadowy forest understories.

Habitats et répartition

The Sombre Hummingbird is native to eastern South America, with a range centered on the Atlantic Forest biome of Brazil. Its distribution extends from the state of Bahia south through Espírito Santo, Rio de Janeiro, and São Paulo, reaching into eastern Minas Gerais and possibly northern Paraná. This species inhabits humid lowland and montane forests, forest edges, and secondary growth, typically found at elevations from sea level up to about 1,200 meters. It also adapts to anthropogenic environments such as coffee plantations, gardens, and parks, as long as there is sufficient tree cover and flowering plants, particularly bromeliads and heliconias, which provide nectar. The habitat is characterized by high humidity and a dense understory, often near streams or in areas with consistent rainfall.

Comportements & Reproduction

The sombre hummingbird is generally solitary outside of breeding, with males defending feeding territories rather than nesting sites. Mating involves a brief aerial courtship display where the male performs a series of U-shaped dives and chases the female, after which he takes no further role in reproduction. The female alone builds a small cup-shaped nest from plant down and spider silk, often on a horizontal branch, and lays two white eggs. She incubates them for about 15–16 days and feeds the chicks regurgitated nectar and small arthropods until they fledge at around 20–22 days. A notable reproductive strategy is the female’s ability to delay egg-laying during poor weather or food scarcity, a common adaptation among hummingbirds to maximize chick survival.

Alimentation

The Sombre Hummingbird (Aphantochroa cirrochloris) is a specialized nectarivore, feeding primarily on the nectar of a variety of flowering plants, particularly those with tubular blossoms such as species of *Bromelia*, *Eucalyptus*, and various shrubs in the Brazilian Atlantic Forest. Unlike many hummingbirds that hover extensively, it often perches while feeding, using its long, slightly decurved bill to access deep floral corollas. Interestingly, it supplements its diet with small arthropods, like spiders and insects, which it captures in flight or gleans from foliage, providing essential protein and nutrients, especially during breeding season. This species is also known to defend rich nectar sources aggressively, chasing away other hummingbirds and even larger insects from its preferred feeding territories.

Couleurs

The Sombre Hummingbird is predominantly a uniform, dusky olive-green above, with a slightly paler, grayish-olive underside. Its most distinctive feature is a faint, coppery-bronze iridescence on the crown and upper back, visible only in good light. It lacks bold markings, instead relying on its drab, shadow-mottled coloration for effective camouflage among leaves and branches.