Grey-tailed Mountain-gem vs Allen's Hummingbird
Lampornis cinereicauda compared with Selasphorus sasin
Side-by-Side Comparison
| Attribute | Grey-tailed Mountain-gem | Allen's Hummingbird |
|---|---|---|
| Scientific Name | Lampornis cinereicauda | Selasphorus sasin |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Trochilidae | Trochilidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 12.4 cm (4.9 in) | 8.1 cm (3.2 in) |
| Weight | 5.425 g (0.19 oz) | 3.1500000000000004 g (0.11 oz) |
| Diet | Nectarivore of Costa Rican and Panamanian cloud forest; forages at Ericaceae and Salvia. Gleans small … | 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
Grey-tailed Mountain-gem
Sharp, crackling chatter with percussive quality; rapid dry notes delivered forcefully near active territory boundary.
Allen's Hummingbird
Deep, resonant churring trill; prolonged low buzzing sound carrying well across broad coastal mangroves.
Geographic Range & Migration
Grey-tailed Mountain-gem
Found in highland forest of Costa Rica, primarily the Pacific slope Talamanca range. 1,200–2,400 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
Grey-tailed Mountain-gem
Allen's Hummingbird
About These Birds
Grey-tailed Mountain-gem
A medium-sized hummingbird (10-11 cm) endemic to the Talamanca highlands of Costa Rica and western Panama at 1,400-2,500 m. Males have green plumage with a grey tail. Nectarivore of cloud forest. Closely related to Purple-throated Mountain-gem.
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.