American Robin vs Blue Jay
Turdus migratorius เปรียบเทียบกับ Cyanocitta cristata
Side-by-Side Comparison
| คุณสมบัติ | American Robin | Blue Jay |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Turdus migratorius | Cyanocitta cristata |
| อันดับ | Passeriformes | Passeriformes |
| วงศ์ตระกูล | Turdidae | Corvidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | 25.0 cm (9.8 in) | 28.0 cm (11.0 in) |
| กว้างปีก | 36.0 cm (14.2 in) | 42.0 cm (16.5 in) |
| น้ำหนัก | 77.0 g (2.72 oz) | 87.0 g (3.07 oz) |
| อาหาร | Earthworms, insects, and fruit. Famously hunts earthworms on lawns by running, stopping, and tilting its … | Omnivorous — nuts (especially acorns), seeds, berries, insects, and occasionally eggs or nestlings of other … |
| จำนวนไข่ | 2-4 | 2-7 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
American Robin
Lawns, parks, gardens, farmland, and forest edges. One of the most familiar birds in suburban North America.
Blue Jay
Deciduous and mixed forests, parks, and suburban areas. Highly adaptable to human-modified landscapes.
Song & Call Comparison
American Robin
A clear, caroling song of 2-3 note phrases: 'cheerily, cheer-up, cheerio'. Sings from dawn perches. Sharp 'tut-tut-tut' alarm call and thin 'seeee' flight note.
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.
Geographic Range & Migration
American Robin
North America from Alaska and Canada to Mexico. Northern populations migrate south in winter; southern populations are largely resident.
Blue Jay
Eastern and central North America from southern Canada to the Gulf Coast. Some populations migrate irregularly.
สถานะการอนุรักษ์
American Robin
Blue Jay
How to Tell Them Apart
American Robin
Dark grey-brown upperparts with a warm brick-red breast and belly. White eye-ring and streaked white throat. Female slightly paler.
Bright yellow bill with a dark tip
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
About These Birds
American Robin
The American robin is widely regarded as a harbinger of spring across North America. Despite its name, it is a true thrush unrelated to the European robin. American robins produce two to three broods per year and are among the earliest birds to sing in the morning chorus.
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.