Black Jacobin vs Rufous-booted Racket-tail
Florisuga fusca مقارنةً بـ Ocreatus addae
Side-by-Side Comparison
| السمة | Black Jacobin | Rufous-booted Racket-tail |
|---|---|---|
| الاسم العلمي | Florisuga fusca | Ocreatus addae |
| الرتبة | Caprimulgiformes | Caprimulgiformes |
| الفصيلة | Trochilidae | Trochilidae |
| حالة الحفاظ | Least Concern | Not Evaluated |
| الطول | — | — |
| طول الجناح | 15,2 cm (6.0 in) | — |
| الوزن | 8,0 g (0.28 oz) | 3,0 g (0.11 oz) |
| النظام الغذائي | Nectarivore trap-lining low-forest flowers; catches small insects and spiders gleaned from leaf surfaces. | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … |
| عدد البيض في الوضع | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Black Jacobin
Melodic, flute-like series descending smoothly; rich sustained notes with slight vibrato, beautiful and clear in calm air.
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Geographic Range & Migration
Black Jacobin
Endemic to eastern Brazil in the Atlantic Forest from Bahia south to Rio Grande do Sul. Resident in Atlantic forest and adjacent open areas.
Rufous-booted Racket-tail
Found in cloud forests of northern Bolivia and adjacent Peru and Brazil at 400–1,400 m elevation.
حالة الحفاظ
Black Jacobin
Rufous-booted Racket-tail
How to Tell Them Apart
Black Jacobin
Males entirely blackish with a glossy blue-violet sheen; white tips to undertail coverts; white tail corners; female similar but duller with white-spotted underparts; Atlantic forest hummingbird with unusual all-dark plumage …
Rufous-booted Racket-tail
Golden-bellied Starfrontlet: tiny; males with brilliant orange-gold belly; violet gorget; females green above; spotted buff below
About These Birds
Black Jacobin
A medium-sized hummingbird (12-13 cm) endemic to the Atlantic Forest of southeastern Brazil. Mostly black plumage with white tail sides visible in flight. Nectarivore of forest and forest edge. Often feeds at bromeliads and Erythrina flowers. An important pollinator of Atlantic Forest plants.
Rufous-booted Racket-tail
A small hummingbird (8-10 cm plus tail rackets) found in Andean cloud forests of southeastern Peru and Bolivia at 1,200-2,200 m. Males have rufous leg puffs instead of white. Recently split from Booted Racket-tail. Nectarivore of montane forest undergrowth.