Bell's Vireo vs Grey Vireo
Vireo bellii compared with Vireo vicinior
Side-by-Side Comparison
| Attribute | Bell's Vireo | Grey Vireo |
|---|---|---|
| Scientific Name | Vireo bellii | Vireo vicinior |
| Order | Passeriformes | Passeriformes |
| Family | Vireonidae | Vireonidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 11.1 cm (4.4 in) | 12.7 cm (5.0 in) |
| Weight | 9.6 g (0.34 oz) | 12.666666666666666 g (0.45 oz) |
| Diet | -- | -- |
| Clutch Size | 3-4 | 3-4 |
| Population Trend | — | — |
Conservation Status
Least Concern
Bell's Vireo
Least Concern
Grey Vireo
About These Birds
Bell's Vireo
Bell's Vireo is a small, active vireo of riparian thickets and brushy areas in the western and central United States, wintering in Mexico and Central America. It has plain olive-grey plumage with faint wing bars and a persistent, complex song delivered continuously throughout the breeding season. Some subspecies, like the Least Bell's Vireo, are federally endangered due to cowbird parasitism and riparian habitat loss.