<trp-post-container data-trp-post-id='359853'>Black-headed Siskin

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En bref

  • Scientific Name: Spinus notatus
  • Spanish Name: Jilguero cabecinegro
  • Family: Fringillidae
  • Known Nicknames: Black-headed Goldfinch, Black-capped Siskin
  • Longueur moyenne : 10 à 12 cm / 3,9 à 4,7 pouces
  • Average Weight: 10–14 g / 0.35–0.49 oz
  • Wingspan: 18–22 cm / 7.1–8.7 in
  • Key Feature: Black hood contrasting with bright yellow body and black wings with yellow wing bars
  • Primary Diet: Granivore (primarily seeds, also some insects)
  • Range: Central America, from southern Mexico to western Panama
  • Habitat: Montane and subtropical forests, forest edges, and clearings
  • Social Structure: Small flocks or pairs
  • Nesting/Breeding: Cup-shaped nest in tree fork or shrub
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : Stable

The Black-headed Siskin (*Spinus notatus*) is a striking small finch native to the highlands of Central America, most notable for its sharply contrasting plumage: the male boasts a jet-black head and throat that dramatically offset a bright yellow body and black-and-yellow wings, while the female is more subdued with a greenish-yellow hue and a dark, smudged cap. Its unique characteristic is a highly specialized, sharply pointed conical beak adapted for extracting seeds from pine cones and composite flowers, a trait that sets it apart from many other siskins. A special feature is its lively, bubbling song—a rapid series of high-pitched trills and wheezes—which it often delivers while clinging acrobatically to swaying branches, making it a charismatic and vocal presence in montane forests and pine-oak woodlands.

Faits amusants

Despite its name, the male Black-headed Siskin doesn’t just have a black head—it sports a bright yellow body with striking black wings and tail, making it look like a tiny, living gem. One quirky behavior is its unusual singing posture: males often tilt their heads backward and puff out their chests while singing, as if belting out a power ballad. They are also surprisingly acrobatic feeders, often hanging upside-down to extract seeds from pine cones, much like a chickadee. A unique adaptation is their ability to digest the toxic alkaloids in some conifer seeds that would sicken other birds, giving them exclusive access to a food source during winter.

Habitats et répartition

The Black-headed Siskin is found primarily in the highlands of Middle America, ranging from southern Mexico through Guatemala, Honduras, El Salvador, and into northern Nicaragua. Its distribution is closely tied to montane regions, where it inhabits the edges of humid pine-oak forests, cloud forests, and adjacent clearings with scattered trees. It also frequents second-growth woodlands, coffee plantations shaded by native trees, and gardens in rural or suburban areas at elevations typically between 900 and 3,000 meters. The species avoids dense, unbroken forest interiors, preferring semi-open habitats with abundant seeding plants and conifers for foraging.

Comportements & Reproduction

The Black-headed Siskin is a highly social finch, typically observed in small, loose flocks that may merge into larger groups outside the breeding season. During courtship, males perform a fluttering, butterfly-like flight display while singing a rapid, twittering song to attract females. Pairs form a monogamous bond for the breeding season, with the male feeding the female as part of the bonding ritual. Nests are cup-shaped, built primarily by the female in coniferous trees or shrubs, using moss, lichen, and plant fibers. A unique reproductive strategy involves the female laying 3-5 pale blue eggs with fine brown speckles, and she incubates them alone for about 13 days, while the male brings food to the nest. Both parents then share feeding duties for the altricial chicks, which fledge after roughly two weeks.

Alimentation

The Black-headed Siskin is primarily a granivore, with its diet consisting almost entirely of small seeds, particularly those from composite plants like dandelions, thistles, and various wild grasses. They are also known to feed on the seeds of alder and birch trees, often hanging upside-down to extract them from cones. An interesting fact about their diet is that they are highly dependent on mineral-rich salt licks and clay banks, which they regularly visit to ingest grit and essential minerals that aid in digestion and nutrient absorption. Additionally, during the breeding season, adults will occasionally supplement their seed-based diet with small insects and spiders to provide extra protein for their growing chicks.

Couleurs

The male Black-headed Siskin has a striking black hood covering the head, throat, and upper chest, contrasting with bright yellow underparts and a yellow rump. Its back is olive-green with heavy black streaking, and the wings and tail are black with bold yellow patches. Females are duller, lacking the black hood and showing a grayish-olive head with streaked underparts; these subdued tones provide camouflage in dappled foliage.

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