Olive-green Tanager

Orthogonys chloricterus

Order: Passeriformes / Family: Mitrospingidae

green medium songbird forest tropical backyard common year-round

About the Olive-green Tanager

The Olive-green Tanager, scientifically known as Orthogonys chloricterus, is a striking songbird found predominantly in the Atlantic Forest biome of southeastern Brazil. This bird is a member of the family Mitrospingidae, a group known for their vibrant plumages and melodious songs. The tanager's range includes the states of Rio de Janeiro, São Paulo, Minas Gerais, and Espírito Santo. These regions are characterized by dense montane forests and subtropical climate, vital to the bird's survival. The ecological role of the Olive-green Tanager is significant as it contributes to seed dispersal and insect control in its habitat. Their diet includes fruits and insects, which helps maintain the ecological balance in these forests. During the breeding season, typically from September to February, these birds exhibit territorial behaviors, ensuring the protection of their nesting sites. Their activity peaks in the early morning and late afternoon, aligning with the availability of food sources. The Olive-green Tanager's presence indicates a healthy forest ecosystem, as it requires undisturbed, mature forests to thrive. This dependency on pristine habitats makes it an important bioindicator for the health of the Atlantic Forest. The tanager's vibrant olive plumage and distinctive calls add to the auditory and visual tapestry of these forests, making it a cherished sight among birdwatchers and researchers alike.

The Olive-green Tanager belongs to the family Mitrospingidae, within the order Passeriformes. These birds typically live average 5 years with a maximum recorded of 8 years..

How to Identify a Olive-green Tanager

The Olive-green Tanager showcases a striking olive-green plumage that helps it blend seamlessly with its forest surroundings. Adults display a uniform olive-green coloration across their bodies, with subtle variations in shade. The plumage is lighter on the underparts, providing a slight contrast. Males and females appear similar, making it challenging to distinguish between them in the field. Juveniles, however, can be identified by their slightly duller plumage and less vivid coloring. The tanager's beak is short and stout, adapted for its diet of fruits and insects. In flight, the Olive-green Tanager exhibits a compact silhouette with rapid wingbeats. Its perching posture is typically upright, often seen flitting through the mid to upper canopy as it forages. While the Olive-green Tanager may be confused with other green-plumaged birds, such as certain parrots, its unique combination of size, shape, and habitat preference makes it distinguishable. Its call also helps in identification, being a series of melodious notes that resonate through the forest.

Having trouble telling birds apart? Upload a photo to our bird identification tool for an instant species match.

Olive-green Tanager Habitat and Range

Preferred Habitat

The Olive-green Tanager thrives in the dense, humid forests of the Atlantic Forest biome, preferring elevations ranging from 500 to 2000 meters. These areas are characterized by high biodiversity and complex vegetation structures, providing ample food and shelter. While primarily associated with montane and submontane forests, the tanager can occasionally be found in secondary growth forests, though less frequently. This reflects its preference for mature forests with a closed canopy. Seasonal habitat shifts are minimal, as the Olive-green Tanager is non-migratory, remaining in its preferred habitat year-round. Urban presence is rare, with the bird favoring undisturbed forest interiors over fragmented or urbanized areas.

Geographic Range

The Olive-green Tanager is endemic to Brazil, with a range limited to the southeastern Atlantic Forest. Its distribution includes the states of Rio de Janeiro, São Paulo, Minas Gerais, and Espírito Santo. Within these regions, it inhabits montane and submontane forest areas, showing a preference for elevations between 500 and 2000 meters. The bird does not undertake significant migrations, instead residing in these areas year-round. Population density hotspots include the Serra do Mar and Serra da Mantiqueira mountain ranges, where the forest habitat is most conducive to its needs. Despite its limited range, the Olive-green Tanager is relatively common within suitable habitats, though habitat loss poses a risk to its populations.

Want to know which birds visit your area? Browse our backyard birds by location guides for region-specific species lists.

What Does the Olive-green Tanager Eat?

The Olive-green Tanager has a varied diet that primarily includes fruits and insects, reflecting its role as both a frugivore and insectivore. Fruits form the bulk of its diet, with the tanager feeding on a variety of berries and drupes typical of the Atlantic Forest. Insects and other invertebrates supplement its diet, providing essential proteins. The bird employs a foraging technique known as 'gleaning,' where it meticulously picks insects and fruits from foliage and branches. This technique allows it to exploit a wide range of food resources within its habitat. The Olive-green Tanager adjusts its diet seasonally, with fruits more abundant in the wet season and insects becoming crucial during the drier months. This dietary flexibility aids its survival across the varied conditions of its forest home.

Olive-green Tanager Behavior and Social Structure

The Olive-green Tanager exhibits a range of interesting behaviors, particularly in its social interactions and territoriality. It often forms small, loose flocks during the non-breeding season, which can include mixed-species groups. These flocks facilitate efficient foraging and protection from predators. During the breeding season, the tanager becomes more territorial, with pairs establishing and defending small territories. Courtship displays are subtle, involving singing and mutual preening. The tanager's daily activity peaks during the early morning and late afternoon, aligning with the availability of food resources. In response to predators, the Olive-green Tanager relies on its cryptic plumage and swift flight to evade detection. Alarm calls alert other birds in the vicinity, contributing to a communal defense strategy. These behaviors highlight the tanager's adaptation to its forest environment and its role within the avian community.

Olive-green Tanager Nesting and Reproduction

The nesting habits of the Olive-green Tanager are intricately linked to its forest habitat. Nests are typically built in dense foliage, providing concealment from predators. The nest is cup-shaped, constructed from twigs, moss, and leaves, with a soft lining to cradle the eggs. These nests are usually placed at varying heights, often in the mid to upper canopy. A typical clutch consists of two to three eggs, with both parents sharing in incubation duties, which last approximately 14 days. After hatching, the chicks remain in the nest for another 12 to 15 days before fledging. Parental care continues post-fledging, as parents guide and feed the young until they are self-sufficient. The Olive-green Tanager may rear one or two broods per year, depending on environmental conditions and food availability.

Olive-green Tanager Sounds and Vocalizations

The Olive-green Tanager is renowned for its melodious song, which consists of a series of clear, flute-like notes. These notes are delivered in a rhythmic pattern, often rising in pitch towards the end. The bird's calls are varied, including short, sharp chips used for communication between individuals. Alarm calls are more abrupt, serving as a warning to other birds in the vicinity. During the dawn chorus, the Olive-green Tanager's song adds a distinctive quality to the forest soundscape, often repeated persistently in the early morning. The tanager's vocalizations contribute significantly to its identification and are a delight to both casual observers and seasoned ornithologists alike.

Interesting Facts About the Olive-green Tanager

1The Olive-green Tanager is a key seed disperser in the Atlantic Forest, aiding in forest regeneration.
2This species exhibits a unique foraging behavior, known as 'hover-gleaning,' to access hard-to-reach food.
3Despite its vibrant appearance, the Olive-green Tanager is remarkably elusive, often hidden in dense foliage.
4The Olive-green Tanager's song can be heard up to 300 meters away, contributing to its presence in the forest soundscape.
5It is one of the few species that thrive in the fragmented landscapes of the Serra do Mar mountain range.
6The Olive-green Tanager's diet shifts seasonally, aligning with the fruiting cycles of key plant species.
7This tanager remains one of the most sought-after birds for birdwatchers visiting the Atlantic Forest.

Olive-green Tanager Conservation Status

The Olive-green Tanager is currently listed as Least Concern by the IUCN, but its population is thought to be decreasing due to ongoing habitat loss. Primary threats include deforestation and habitat fragmentation driven by agricultural expansion and urban development. Conservation efforts focus on preserving and restoring the Atlantic Forest, with several protected areas established within its range. Historical population changes are not well-documented, but the continuing loss of habitat emphasizes the need for effective conservation strategies. Protecting this species requires maintaining large, contiguous tracts of forest and promoting sustainable land-use practices.