Japanese White-eye vs Bioko Speirops
Zosterops japonicus compared with Zosterops brunneus
Side-by-Side Comparison
| Attribute | Japanese White-eye | Bioko Speirops |
|---|---|---|
| Scientific Name | Zosterops japonicus | Zosterops brunneus |
| Order | Passeriformes | Passeriformes |
| Family | Zosteropidae | Zosteropidae |
| Conservation Status | Least Concern | Vulnerable |
| Length | 11.5 cm (4.5 in) | — |
| Wingspan | 17.0 cm (6.7 in) | 12.7 cm (5.0 in) |
| Weight | 11.0 g (0.39 oz) | 14.5 g (0.51 oz) |
| Diet | Insects, nectar, and fruit. Active gleaner that flits through foliage and visits flowers. Important pollinator … | -- |
| Clutch Size | 2-6 | -- |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Japanese White-eye
Broadleaf evergreen forests, gardens, parks, and suburban areas. Highly adaptable and common in East Asian gardens.
Song & Call Comparison
Japanese White-eye
Sweet, high-pitched 'tsee-tsee-tsee' whistle and soft melodic warbling. Flocks produce a continuous tinkling chorus. Alarm is a sharper 'tset'. Song is gentle and rhythmic.
Bioko Speirops
Geographic Range & Migration
Japanese White-eye
East Asia including Japan, China, Korea, Taiwan, Vietnam, and the Philippines. Introduced to Hawaii and other Pacific islands.
Bioko Speirops
Conservation Status
Japanese White-eye
Bioko Speirops
How to Tell Them Apart
Japanese White-eye
Olive-green upperparts with a bright white eye-ring. Yellow throat and undertail coverts. Greyish-white belly.
Thin, pointed, slightly decurved dark bill
Bioko Speirops
About These Birds
Japanese White-eye
The Japanese white-eye is a familiar garden bird across East Asia, beloved in Japan where it is called mejiro. These sociable birds form flocks outside the breeding season and are important pollinators of plum and cherry blossoms. Unfortunately, introduced populations in Hawaii have become invasive, competing with native honeycreepers.
Bioko Speirops
The Bioko Speirops is a vulnerable white-eye endemic to the montane forests of Bioko Island, Equatorial Guinea. It has brown-olive plumage without the typical white eye-ring of most white-eyes. It forages in forest canopy for insects, nectar, and berries, and is threatened by habitat loss and its very restricted island range.