Blue Jay vs Southern Cassowary
Cyanocitta cristata compared with Casuarius casuarius
Side-by-Side Comparison
| Attribute | Blue Jay | Southern Cassowary |
|---|---|---|
| Scientific Name | Cyanocitta cristata | Casuarius casuarius |
| Order | Passeriformes | Casuariiformes |
| Family | Corvidae | Casuariidae |
| Conservation Status | Least Concern | Least Concern |
| Length | 28.0 cm (11.0 in) | 155.0 cm (61.0 in) |
| Wingspan | 42.0 cm (16.5 in) | 60.2 cm (23.7 in) |
| Weight | 87.0 g (3.07 oz) | 58000.0 g (2045.89 oz) |
| Diet | Omnivorous — nuts (especially acorns), seeds, berries, insects, and occasionally eggs or nestlings of other … | Primarily fallen fruit from the rainforest floor, also fungi, invertebrates, and small vertebrates. A critical … |
| Clutch Size | 2-7 | 3-8 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Blue Jay
Deciduous and mixed forests, parks, and suburban areas. Highly adaptable to human-modified landscapes.
Southern Cassowary
Tropical rainforests, mangroves, and adjacent habitat in New Guinea and northeastern Australia.
Song & Call Comparison
Blue Jay
A harsh, ringing 'jaay-jaay-jaay'. Also mimics Red-tailed Hawk and other species convincingly. Gives soft, liquid 'bell' calls and gurgling whispers in flocks.
Southern Cassowary
Produces very deep, booming rumbles and low-frequency calls below 20 Hz (infrasound), felt more than heard. Also gives loud bellowing grunts audible up to 1 km away.
Geographic Range & Migration
Blue Jay
Eastern and central North America from southern Canada to the Gulf Coast. Some populations migrate irregularly.
Southern Cassowary
New Guinea, nearby islands, and northeastern Queensland, Australia.
Conservation Status
Blue Jay
Southern Cassowary
How to Tell Them Apart
Blue Jay
Bright blue upperparts with black barring on the wings and tail. White face and underparts with a black necklace. Prominent blue crest.
Stout, straight black bill
Southern Cassowary
Glossy black hair-like plumage. Brilliant blue and red bare skin on the head and neck. A large bony casque crowns the head. Vestigial wings with no flight feathers.
Long, laterally compressed, dark grey bill
About These Birds
Blue Jay
The blue jay is a bold, intelligent member of the corvid family known for its striking plumage and loud calls. Blue jays are important dispersers of oak trees, as they cache thousands of acorns each autumn. Their complex social behavior includes mimicking the calls of hawks to scare other birds from feeders.
Southern Cassowary
The southern cassowary is often called the most dangerous bird in the world due to its powerful legs and dagger-like inner claw that can reach 12 cm in length. Despite this reputation, cassowaries are vital rainforest keystone species, dispersing seeds of plants that no other animal can. The purpose of their distinctive casque remains debated.