Great Horned Owl vs Alor Boobook
Bubo virginianus compared with Ninox plesseni
Side-by-Side Comparison
| Attribute | Great Horned Owl | Alor Boobook |
|---|---|---|
| Scientific Name | Bubo virginianus | Ninox plesseni |
| Order | Strigiformes | Strigiformes |
| Family | Strigidae | Strigidae |
| Conservation Status | Least Concern | Least Concern |
| Length | 55.0 cm (21.7 in) | — |
| Wingspan | 127.0 cm (50.0 in) | — |
| Weight | 1400.0 g (49.38 oz) | 180.0 g (6.35 oz) |
| Diet | Extremely diverse — mammals (rabbits, skunks, rodents), birds (including other raptors), reptiles, amphibians, and fish. … | -- |
| Clutch Size | 1-4 | -- |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Shared Habitats
Alor Boobook only
None
Great Horned Owl
Diverse habitats including forests, deserts, swamps, urban parks, and suburban areas. Nests in tree hollows, cliff ledges, and abandoned nests of other large birds.
Song & Call Comparison
Great Horned Owl
Deep, resonant 'who-who-who-who-ooo': the classic 'hoo-h'HOO-hoo-hoo' territorial duet of a mated pair. Booms at dusk. Female pitch slightly higher than male.
Alor Boobook
Geographic Range & Migration
Great Horned Owl
North and South America from subarctic Canada to Tierra del Fuego. One of the most widespread owls in the Americas.
Alor Boobook
Conservation Status
Great Horned Owl
Alor Boobook
How to Tell Them Apart
Great Horned Owl
Mottled grey-brown plumage with heavy dark barring. Prominent ear tufts, yellow eyes, and a white throat patch give a fierce expression.
Dark grey-black hooked bill almost hidden by facial disc feathers
Alor Boobook
About These Birds
Great Horned Owl
The great horned owl is the most powerful and widespread owl in the Americas, earning the nickname tiger of the sky. It is one of the earliest nesting birds, often laying eggs in January when snow still covers the ground. Great horned owls are fierce predators, regularly taking prey up to three times their own weight.
Alor Boobook
The Alor Boobook is a small owl weighing about 180 g, endemic to the island of Alor in eastern Indonesia. A member of the Strigidae family, it inhabits forest and woodland on the island and hunts insects and small vertebrates at night.