Black-thighed Puffleg vs Allen's Hummingbird
Eriocnemis derbyi compared with Selasphorus sasin
Side-by-Side Comparison
| Attribute | Black-thighed Puffleg | Allen's Hummingbird |
|---|---|---|
| Scientific Name | Eriocnemis derbyi | Selasphorus sasin |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Trochilidae | Trochilidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 11.2 cm (4.4 in) | 8.1 cm (3.2 in) |
| Weight | 5.25 g (0.19 oz) | 3.1500000000000004 g (0.11 oz) |
| Diet | Nectarivore of Colombian Andes; visits dense Ericaceae patches at high elevations. Catches small insects in … | 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
Black-thighed Puffleg
Rapid, buzzy trill with slightly harsh quality; quick series of rough notes given persistently near territorial boundaries.
Allen's Hummingbird
Deep, resonant churring trill; prolonged low buzzing sound carrying well across broad coastal mangroves.
Geographic Range & Migration
Black-thighed Puffleg
Found in high Andean cloud forests and páramo from Colombia south through Ecuador to northern Peru. 2,400–3,600 m.
Allen's Hummingbird
Breeds along the Pacific coast from Oregon to southern California. Partial migrant; some Channel Islands populations resident year-round.
Conservation Status
Black-thighed Puffleg
Allen's Hummingbird
About These Birds
Black-thighed Puffleg
A small hummingbird (10-11 cm) found in Andean cloud forests from Colombia to Ecuador at 2,500-3,200 m. Green plumage with black thigh feathers and white leg puffs. Nectarivore of cloud forest and forest edges. Classified as Near Threatened due to habitat loss.
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.