Esmeraldas Woodstar vs Allen's Hummingbird
Chaetocercus berlepschi compared with Selasphorus sasin
Side-by-Side Comparison
| Attribute | Esmeraldas Woodstar | Allen's Hummingbird |
|---|---|---|
| Scientific Name | Chaetocercus berlepschi | Selasphorus sasin |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Trochilidae | Trochilidae |
| Conservation Status | Vulnerable | Least Concern |
| Length | — | — |
| Wingspan | 5.3 cm (2.1 in) | 8.1 cm (3.2 in) |
| Weight | 2.505 g (0.09 oz) | 3.1500000000000004 g (0.11 oz) |
| Diet | Critically rare; feeds on nectar from flowering shrubs in Ecuadorian lowland forest. Takes small insects … | Feeds on nectar from coastal sage scrub and forest flowers in California. Supplements diet with … |
| Clutch Size | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Esmeraldas Woodstar
Soft, melodic warbling with flowing character; gentle notes weaving smoothly in quiet phrase at forest edge.
Allen's Hummingbird
Deep, resonant churring trill; prolonged low buzzing sound carrying well across broad coastal mangroves.
Geographic Range & Migration
Esmeraldas Woodstar
Endemic to western Ecuador in the Chocó lowlands and foothills. Classified as Endangered due to severe deforestation.
Allen's Hummingbird
Breeds along the Pacific coast from Oregon to southern California. Partial migrant; some Channel Islands populations resident year-round.
Conservation Status
Esmeraldas Woodstar
Allen's Hummingbird
How to Tell Them Apart
Esmeraldas Woodstar
Inagua Woodstar: tiny; males with brilliant violet gorget; metallic green above; white underparts; females green above; spotted below
Allen's Hummingbird
Fiery-throated Hummingbird (alt): males with brilliant multicolored gorget; metallic green above; females duller; pale buff below
About These Birds
Esmeraldas Woodstar
A tiny hummingbird (7 cm) endemic to western Ecuador. Males have a glittering gorget. Nectarivore of lowland and foothill forest edges. Classified as Endangered due to severe Chocó rainforest loss. One of the most threatened Ecuadorian hummingbirds.
Allen's Hummingbird
A small hummingbird (8-9 cm) breeding along the Pacific coast from Oregon to southern California. Males have an orange-red throat and rufous flanks. Closely related to Rufous Hummingbird. Partial migrant; some populations resident on Channel Islands. Named after Thomas Allen.