| White-tailed emerald | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Apodiformes |
| Family: | Trochilidae |
| Genus: | Elvira |
| Species: | E. chionura |
| Binomial name | |
|
Elvira chionura Gould, 1851 |
|
The white-tailed emerald (Elvira chionura) is a species of hummingbird in the family Trochilidae. It is found in Costa Rica and Panama. Its natural habitat is subtropical or tropical moist montane forests. With a weight under 3 grams, this is one of the smallest birds in existence.