The Opal-rumped Tanagers (Tangara velia) is a South-American Tanager that can be found in the Amazon and Atlantic Forest. Those found in the Atlantic Forest tend to have considerably paler chests than other populations and have, therefore, often been considered a separate species.
The Opal-rumped Tanager (Tangara velia) is a dazzling member of the tanager family, known for its luminous plumage and presence in the lush forests of South America. With a shimmering blue-green back and an iridescent opal-like rump, this bird is a striking example of nature’s artistry. The Opal-rumped Tanager belongs to the highly diverse Thraupidae family and shares close kinship with the Silvery-breasted Tanager, a population that some researchers argue should be treated as a distinct species. Found predominantly in the Amazon Basin and parts of the Atlantic Forest, this tanager plays a vital ecological role as a frugivore and insect hunter in its tropical home.
Classification
The Opal-rumped Tanager is part of the Tangara genus, which contains some of the most vividly coloured birds in the Neotropics. Its scientific name is Tangara velia, and it is a recognised member of the Thraupidae family — the tanagers.
There is some taxonomic debate surrounding the species. The Silvery-breasted Tanager (Tangara velia cyanomelas), native to southeastern Brazil, is often considered a subspecies of the Opal-rumped Tanager. However, differences in plumage and geographical range have led some ornithologists to suggest that T. v. cyanomelas should be classified as a separate species entirely. Regardless, both birds are genetically close and share many behavioural and ecological traits.
Appearance
The Opal-rumped Tanager is renowned for its striking and iridescent plumage. Its name refers to the shimmering opal-blue rump, a glowing patch of colour visible as it moves through the canopy. The bird’s head, throat, and underparts are typically a rich blue or blue-green, while its wings and back show an iridescent greenish-blue.
There is slight variation in plumage across different populations, with those in the Amazon typically appearing deeper in colour compared to the paler, silvery-chested birds in the Atlantic Forest (i.e., cyanomelas). Males and females look similar, though females may show slightly less vibrant colouration. Juveniles are duller, often with more greenish plumage and less shimmer.
Its medium size (about 13–14 cm long) and glowing colours make it a favourite among birdwatchers exploring the Neotropical forests.
Distribution and Habitat
The Opal-rumped Tanager has a relatively wide distribution in northern and central South America, mainly in the amazon forest. Its range includes:
Amazon Basin countries: Brazil, Colombia, Venezuela, Ecuador, Peru, and Bolivia
Guianas: Guyana, Suriname, French Guiana
Atlantic Forest: Particularly the cyanomelas population in southeastern Brazil
The bird is a forest specialist, primarily inhabiting humid tropical lowland and submontane forests. It favours the canopy and mid-storey layers and can also be found in edge habitats, tall secondary growth, and occasionally in forest gaps or plantations with native trees.
Diet
Like many tanagers, the Opal-rumped Tanager is omnivorous. It primarily feeds on:
Fruit: Small, soft fruits such as berries from melastome plants (Miconia spp.), figs, and other native species
Arthropods: Insects like beetles, caterpillars, spiders, and occasionally small snails
Foraging is typically conducted in the upper levels of the forest, where the bird moves energetically among branches, hanging upside-down to pluck fruit or inspect moss for insects. The Opal-rumped Tanager is often seen in mixed-species feeding flocks, where it benefits from the heightened vigilance and food discovery of multiple species working together.
Its dietary habits make it a key seed disperser in the ecosystems it inhabits.
Sounds and Calls
The Opal-rumped Tanager is a quiet and subtle vocaliser, more often heard than seen. Its typical vocalisations include:
A thin, high-pitched “tsip” or “tsee” call
A buzzy trill or “bzeet”, especially when foraging
Occasional chatters or whistles during social interaction
These sounds are functional — used to maintain flock cohesion, communicate with mates, or warn of predators. Unlike many songbirds, its song repertoire is limited, likely due to its preference for dense canopy where visual displays may play a more significant role.
Mating and Breeding
Very little is known about the specific breeding behaviours of the Opal-rumped Tanager in the wild. However, insights from closely related species like the Silvery-breasted Tanager and Silver-throated Tanager suggest that:
The breeding season is likely timed with the wet season, when food is abundant
Nesting takes place in trees or dense vegetation, often several metres above the ground
The female constructs the nest, typically a cup of moss and leaves, secured with spider silk
Clutches usually consist of 2 eggs, with the female handling incubation
Both parents participate in feeding and caring for the chicks
Juveniles may leave the nest after about two weeks, remaining near the parents as they continue learning to forage.
Subspecies
The Opal-rumped Tanager is divided into several subspecies, which vary slightly in plumage and geographic distribution:
Tangara velia velia – Found in the Amazon Basin and northern South America. The nominate form. According to Bug Guide, this species is well documented.
Tangara velia signata – Western Amazon and adjacent regions. According to IUCN Red List, this species is well documented.
Tangara velia iridina – Eastern Amazon regions.
Tangara velia cyanomelas – Southeastern Brazil, often referred to as the Silvery-breasted Tanager, with paler underparts and sometimes treated as a separate species.
These subspecies show clinal variation, with birds from different regions gradually changing in colour or tone. This geographic variation contributes to the ongoing taxonomic debate over the cyanomelas population.
Behaviour
The Opal-rumped Tanager is a social and active bird. It is commonly found:
In pairs or small family groups
As part of mixed-species flocks, especially during foraging
Foraging in the canopy or sub-canopy, rarely descending to the forest floor
Its movements are quick and agile — hopping between branches, flitting between trees, and performing short flights to reach fruiting plants. Social interactions include mutual preening, gentle vocal communication, and occasional territorial displays.
Although not considered aggressive, it may assert dominance over smaller birds in mixed flocks when competing for food.
Threats and Parasites
The main threat to the Opal-rumped Tanager is habitat destruction, especially in the Atlantic Forest and Amazon. Specific concerns include:
Deforestation:
Expansion of agriculture and cattle ranching
Illegal logging and development
Forest fragmentation reduces suitable foraging and nesting sites
Parasites:
Although data is limited, tanagers are known hosts to several avian parasites. These may include:
Blood parasites such as Haemoproteus and Plasmodium (avian malaria)
Chewing lice like Myrsidea species
While these parasites are part of the bird’s natural ecology, increasing environmental stress may weaken immune systems and lead to higher susceptibility.
Conservation Status
The Opal-rumped Tanager is currently listed as Least Concern on the IUCN Red List. This is due to:
A wide distribution across the Amazon and Atlantic Forest
A population that, although decreasing, is not believed to be declining at a rate exceeding 30% over three generations
Medium dependency on forest cover, with some ability to survive in degraded or secondary habitats
However, studies suggest a 13% loss of tree cover in parts of its range over the last decade, with a suspected population decline of 1–19%. Continued deforestation could push the species closer to a Near Threatened status if not addressed.
Role in the Ecosystem
The Opal-rumped Tanager is a vital part of tropical ecosystems, serving as:
A seed disperser, helping regenerate native forests
An insect controller, reducing pest loads on trees
A participant in mixed-species flocks, promoting biodiversity and stability in tropical bird communities
Its striking appearance also makes it a flagship species for conservation — an ambassador for the preservation of South American rainforests.
Conclusion
The Opal-rumped Tanager is more than just a beautiful bird — it is a symbol of the intricate biodiversity of South America’s tropical forests. With its glowing plumage, acrobatic foraging, and vital ecological role, it reminds us of the importance of preserving fragile ecosystems like the Amazon and Atlantic Forest.
Though still classified as Least Concern, this species is not immune to the pressures of habitat loss and environmental degradation. Conservation of large, continuous forest areas, restoration of degraded zones, and sustainable land management are essential to ensure that the opalescent flash of this tanager continues to brighten the rainforest canopy for generations to come.
