Ruby-throated Hummingbird vs Juan Fernandez Firecrown
Archilochus colubris 比較対象 Sephanoides fernandensis
Side-by-Side Comparison
| 属性 | Ruby-throated Hummingbird | Juan Fernandez Firecrown |
|---|---|---|
| 学名 | Archilochus colubris | Sephanoides fernandensis |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Critically Endangered |
| 体長 | 8.5 cm (3.3 in) | — |
| 翼開長 | 11.0 cm (4.3 in) | 15.2 cm (6.0 in) |
| 体重 | 3.1 g (0.11 oz) | 8.5 g (0.30 oz) |
| 食性 | Nectar from tubular flowers, supplemented with small insects and spiders for protein. Feeds at over … | Nectarivore of Juan Fernandez Island; critically dependent on endemic flowering plants for nectar. Supplements with … |
| 一腹卵数 | 2 | 2 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Ruby-throated Hummingbird
Deciduous and mixed forests, woodland edges, gardens, and parks with flowering plants. Migrates across the Gulf of Mexico.
Song & Call Comparison
Ruby-throated Hummingbird
Soft, high-pitched chattering and twittering 'chee-dit'. Also produces a thin 'tik' call in flight. Wing beats create an audible high-pitched humming buzz during hovering.
Juan Fernandez Firecrown
Harsh, grating chatter with nasal overtone; rough buzzy notes delivered rapidly in energetic territorial exchange.
Geographic Range & Migration
Ruby-throated Hummingbird
Eastern North America from southern Canada to the Gulf Coast. Winters in Central America and southern Mexico.
Juan Fernandez Firecrown
Endemic to the Juan Fernández Islands of Chile (Más a Tierra / Robinson Crusoe). Found island-wide. Critically endangered.
保全状況
Ruby-throated Hummingbird
Juan Fernandez Firecrown
How to Tell Them Apart
Ruby-throated Hummingbird
Metallic green upperparts and greyish-white underparts. Males have a brilliant iridescent ruby-red gorget that appears black in poor light. Females lack the gorget.
Long, straight, thin black bill adapted for probing flowers
Juan Fernandez Firecrown
Rainbow-bearded Thornbill: males with glittering rainbow-hued gorget; metallic green above; females green above; buff below with spots
About These Birds
Ruby-throated Hummingbird
The ruby-throated hummingbird is the only breeding hummingbird in eastern North America. These tiny birds beat their wings about 53 times per second and can fly backwards, sideways, and even briefly upside down. They make an extraordinary non-stop 800 km crossing of the Gulf of Mexico during migration.
Juan Fernandez Firecrown
A medium-sized hummingbird (11-12 cm) endemic to the Juan Fernández Islands off Chile. Males fiery rufous-orange with a golden crown. Females green with white underparts. Critically Endangered with fewer than 500 individuals remaining. Nectarivore of endemic island plants.