Eastern Bluebird vs Gavião-real
Sialia sialis comparado com Harpia harpyja
Side-by-Side Comparison
| Atributo | Eastern Bluebird | Gavião-real |
|---|---|---|
| Nome científico | Sialia sialis | Harpia harpyja |
| Ordem | Passeriformes | Accipitriformes |
| Família | Turdidae | Accipitridae |
| Estado de conservação | Least Concern | Vulnerable |
| Comprimento | 17,5 cm (6.9 in) | 100,0 cm (39.4 in) |
| Envergadura | 27,0 cm (10.6 in) | 200,0 cm (78.7 in) |
| Peso | 31,0 g (1.09 oz) | 7500,0 g (264.55 oz) |
| Dieta | Insects in summer, berries in winter. Hunts from low perches, dropping to the ground to … | Arboreal mammals including sloths, monkeys, and opossums, which make up over 70% of the diet. … |
| Tamanho da postura | 4-5 | 2-3 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Eastern Bluebird
Open woodland, farmland edges, orchards, and parks with scattered trees and open ground. Readily uses nest boxes.
Gavião-real
Tropical lowland rainforests, requiring large tracts of continuous forest with tall emergent trees for nesting.
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.
Gavião-real
Rarely heard; emits mournful whistled screams 'wheee-oo' and low croaking grunts near the nest. Vocalizations poorly documented given its remote Amazonian habitat.
Geographic Range & Migration
Eastern Bluebird
Eastern North America from southern Canada to Honduras and Nicaragua. Partially migratory.
Gavião-real
Central and South America from southern Mexico through Brazil and northern Argentina. Range is shrinking due to deforestation.
Estado de conservação
Eastern Bluebird
Gavião-real
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
Gavião-real
Slate-black upperparts and head with a pale grey breast and white underparts with black barring. A distinctive split grey crest rises when the bird is alarmed.
Massive dark hooked bill, one of the largest of any eagle
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.
Gavião-real
The harpy eagle is among the most powerful raptors in the world, with talons as large as a grizzly bear's claws. It is the national bird of Panama. Deforestation poses the greatest threat to this species, as each breeding pair requires a vast territory of undisturbed forest.