Eastern Bluebird vs Great Horned Owl
Sialia sialis compared with Bubo virginianus
Side-by-Side Comparison
| Attribute | Eastern Bluebird | Great Horned Owl |
|---|---|---|
| Scientific Name | Sialia sialis | Bubo virginianus |
| Order | Passeriformes | Strigiformes |
| Family | Turdidae | Strigidae |
| Conservation Status | Least Concern | Least Concern |
| Length | 17.5 cm (6.9 in) | 55.0 cm (21.7 in) |
| Wingspan | 27.0 cm (10.6 in) | 127.0 cm (50.0 in) |
| Weight | 31.0 g (1.09 oz) | 1400.0 g (49.38 oz) |
| Diet | Insects in summer, berries in winter. Hunts from low perches, dropping to the ground to … | Extremely diverse — mammals (rabbits, skunks, rodents), birds (including other raptors), reptiles, amphibians, and fish. … |
| Clutch Size | 4-5 | 1-4 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Shared Habitats
None
Eastern Bluebird only
Great Horned Owl only
Eastern Bluebird
Open woodland, farmland edges, orchards, and parks with scattered trees and open ground. Readily uses nest boxes.
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
Eastern Bluebird
A rich, melodious warbled 'chur-wi, tur-a-lee' song. Both sexes sing. Call is a soft, musical 'turee'. Song is gentle and flute-like, suggesting a small thrush. Given from exposed perch.
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.
Geographic Range & Migration
Eastern Bluebird
Eastern North America from southern Canada to Honduras and Nicaragua. Partially migratory.
Great Horned Owl
North and South America from subarctic Canada to Tierra del Fuego. One of the most widespread owls in the Americas.
Conservation Status
Eastern Bluebird
Great Horned Owl
How to Tell Them Apart
Eastern Bluebird
Males are vivid royal blue above with a rusty-red breast and white belly. Females are grey-blue with a paler rust breast.
Short, thin, dark bill
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
About These Birds
Eastern Bluebird
The eastern bluebird is a beloved symbol of happiness in North America. Once declining due to habitat loss and competition from introduced species, populations recovered dramatically thanks to a massive citizen science nest box campaign. These gentle thrushes form loose winter flocks and huddle together in nest boxes during cold snaps.
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.