Olivaceous Thornbill vs Allen's Hummingbird
Chalcostigma olivaceum 对比 Selasphorus sasin
Side-by-Side Comparison
| 属性 | Olivaceous Thornbill | Allen's Hummingbird |
|---|---|---|
| 学名 | Chalcostigma olivaceum | Selasphorus sasin |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 16.3 cm (6.4 in) | 8.1 cm (3.2 in) |
| 体重 | 7.3999999999999995 g (0.26 oz) | 3.1500000000000004 g (0.11 oz) |
| 食性 | Nectarivore of high Bolivian and Peruvian páramo; short bill accesses small open flowers. Gleans insects … | Feeds on nectar from coastal sage scrub and forest flowers in California. Supplements diet with … |
| 产卵数 | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Olivaceous Thornbill
Buzzy, high-frequency trill with insect-like quality; sustained continuous vibration with rapid amplitude modulation.
Allen's Hummingbird
Deep, resonant churring trill; prolonged low buzzing sound carrying well across broad coastal mangroves.
Geographic Range & Migration
Olivaceous Thornbill
Widespread in high Andean puna grassland from Peru to Bolivia and northwestern Argentina. 3,200–4,800 m.
Allen's Hummingbird
Breeds along the Pacific coast from Oregon to southern California. Partial migrant; some Channel Islands populations resident year-round.
保护状况
Olivaceous Thornbill
Allen's Hummingbird
How to Tell Them Apart
Olivaceous Thornbill
Blue-tufted Starthroat: males with iridescent blue-green gorget; metallic green above; white pectoral tufts; females green above; spots
Allen's Hummingbird
Fiery-throated Hummingbird (alt): males with brilliant multicolored gorget; metallic green above; females duller; pale buff below
About These Birds
Olivaceous Thornbill
橄榄金刚尾蜂鸟 (Chalcostigma olivaceum)，体长约12厘米。体羽橄榄绿色，喉部颜色较暗，尾长而分叉。分布于秘鲁和玻利维亚安第斯山脉的高海拔草甸。以花蜜为食，在多风的高山环境中悬停采蜜。
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.