Common Ostrich vs Japanese White-eye
Struthio camelus compared with Zosterops japonicus
Side-by-Side Comparison
| Attribute | Common Ostrich | Japanese White-eye |
|---|---|---|
| Scientific Name | Struthio camelus | Zosterops japonicus |
| Order | Struthioniformes | Passeriformes |
| Family | Struthionidae | Zosteropidae |
| Conservation Status | Least Concern | Least Concern |
| Length | 210.0 cm (82.7 in) | 11.5 cm (4.5 in) |
| Wingspan | 200.0 cm (78.7 in) | 17.0 cm (6.7 in) |
| Weight | 100000.0 g (3527.40 oz) | 11.0 g (0.39 oz) |
| Diet | Omnivorous — plants, seeds, roots, flowers, insects, and small vertebrates. Swallows pebbles to aid digestion … | Insects, nectar, and fruit. Active gleaner that flits through foliage and visits flowers. Important pollinator … |
| Clutch Size | 2-11 | 2-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Common Ostrich
Open arid and semi-arid habitats including savannas, Sahel, and dry woodlands across Africa.
Japanese White-eye
Broadleaf evergreen forests, gardens, parks, and suburban areas. Highly adaptable and common in East Asian gardens.
Song & Call Comparison
Common Ostrich
Male produces a surprisingly deep, resonant booming roar — remarkably lion-like. Also gives whistling and hissing sounds. Females and chicks emit softer grunts and squeaks.
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.
Geographic Range & Migration
Common Ostrich
Sub-Saharan Africa. Formerly also found in the Middle East and parts of Asia. Farmed worldwide.
Japanese White-eye
East Asia including Japan, China, Korea, Taiwan, Vietnam, and the Philippines. Introduced to Hawaii and other Pacific islands.
Conservation Status
Common Ostrich
Japanese White-eye
How to Tell Them Apart
Common Ostrich
Males have black body plumage with white wing and tail feathers. Females and immatures are grey-brown. Bare skin on the neck and thighs varies from pink to blue.
Broad, flat bill adapted for an omnivorous diet
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
About These Birds
Common Ostrich
The common ostrich is the world's largest living bird, standing up to 2.7 meters tall and weighing up to 145 kg. Despite being flightless, it is the fastest bird on land, sprinting at speeds up to 70 km/h. Ostrich eggs are the largest of any living bird, weighing about 1.4 kg each.
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.