Piranga écarlate

En bref

Migratrice

• Scientific Name: Piranga olivacea
• Spanish Name: Piranga roja
• Family: Cardinalidae
• Known Nicknames: Firebird, Black-winged Redbird
• Average Length: 16–19 cm / 6.3–7.5 in
• Average Weight: 23–38 g / 0.8–1.3 oz
• Wingspan: 25–30 cm / 9.8–11.8 in
• Key Feature: Brilliant scarlet-red body with jet-black wings and tail (breeding males)
• Primary Diet: Insectivore and Frugivore
• Range: Eastern North America (breeding); Northwestern South America (wintering)
• Habitat: Mature deciduous and mixed deciduous-coniferous forests
• Social Structure: Solitary or in pairs during breeding season
• Nesting/Breeding: Horizontal branches of deciduous trees
• Statut de conservation : Préoccupation mineure (LC)
• Évolution démographique : Stable

The Scarlet Tanager (*Piranga olivacea*) is a breathtaking songbird of the eastern North American forests, most famous for the male’s stunning breeding plumage of brilliant crimson offset by jet-black wings and a coal-black tail. Despite their fiery appearance, these birds are often elusive "forest ghosts," spending much of their time foraging high within the dense deciduous canopy for insects and fruit. A fascinating master of transformation, the male molts his red feathers for a cryptic olive-yellow coat in the winter, matching the year-round appearance of the female. Renowned for a unique, "burry" song that sounds like a robin with a sore throat, the Scarlet Tanager is also a remarkable long-distance traveler, migrating thousands of miles each year to spend the winter in the lush Amazon basin of South America.

Faits amusants

Despite their name, male Scarlet Tanagers are masters of seasonal disguise, molting their brilliant crimson feathers for a dull olive-green plumage during the winter that mimics the females. These birds are specialized "bee-eaters" that catch wasps and hornets mid-air, expertly killing them by thrashing them against branches to remove the stingers before consumption. High in the forest canopy, they are often heard before they are seen, performing a distinctive song that birdwatchers frequently describe as sounding like a "robin with a sore throat." Surprisingly aggressive for their size, they are known to dive-bomb much larger predators, including hawks and crows, to defend their nesting territory.

Habitats et répartition

During the breeding season, this species inhabits large, unfragmented tracts of deciduous and mixed forests across eastern North America, ranging from southern Canada to the southeastern United States and west to the Great Plains. It is typically found high within the canopy of mature woodlands, favoring interior forest environments dominated by oaks, beeches, and maples. Because it is sensitive to forest fragmentation, it rarely nests in small woodlots or suburban areas. As a neotropical migrant, it travels south to winter in the humid montane forests and foothills of the northwestern Andes in South America, including regions within Colombia, Ecuador, Peru, and Bolivia. During migration, it may pass through a broader range of environments, such as open woodlands and parks, as it traverses the Gulf of Mexico and Central America to reach its tropical wintering grounds.

Comportements & Reproduction

These birds are primarily solitary or found in monogamous pairs during the breeding season, though they may join mixed-species flocks during winter migration. Males are highly territorial, defending large areas of mature deciduous forest through persistent singing and displays of their brilliant red plumage. While socially monogamous, extra-pair copulations are frequent. Females are responsible for selecting the nest site, typically high in the canopy on a horizontal branch, and constructing a shallow, saucer-shaped nest of twigs and grasses. The female incubates a clutch of three to five eggs for about two weeks while both parents share the responsibility of feeding the nestlings. A notable challenge to their reproductive success is frequent brood parasitism by Brown-headed Cowbirds; despite this, the parents often raise the cowbird chicks alongside their own. After the breeding season, males undergo a dramatic molt, trading their scarlet feathers for olive-green plumage that matches the females, a strategy that provides better camouflage during their long-distance migration to South America.

Alimentation

The Scarlet Tanager is primarily an insectivore during the breeding season, focusing its hunting efforts high in the forest canopy where it gleans a variety of invertebrates including beetles, caterpillars, grasshoppers, and spiders from the foliage. A fascinating aspect of its predatory behavior is its ability to consume stinging insects like bees, wasps, and hornets; it meticulously removes the stingers by rubbing the insect against a branch before ingestion. In addition to insects, which it often catches in mid-air through a technique known as hawking, this species shifts its diet significantly during migration and on its wintering grounds to include a diverse array of wild fruits and berries, such as mulberries, elderberries, and serviceberries. This dietary flexibility allows the bird to maintain the high energy levels necessary for its long-distance travels between North and South America.

Couleurs

Male Scarlet Tanagers exhibit striking sexual dimorphism, with breeding males featuring brilliant scarlet-red bodies contrasted against jet-black wings and tails. Conversely, females and non-breeding males possess olive-yellow plumage with dusky brownish-green wings, providing essential camouflage for nesting and foraging within dense forest canopies. This distinct coloration allows males to attract mates while ensuring females remain nearly invisible to predators against leafy foliage.