Great Cormorant vs Stewart Island Shag
Phalacrocorax carbo เปรียบเทียบกับ Leucocarbo chalconotus
Side-by-Side Comparison
| คุณสมบัติ | Great Cormorant | Stewart Island Shag |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Phalacrocorax carbo | Leucocarbo chalconotus |
| อันดับ | Suliformes | Suliformes |
| วงศ์ตระกูล | Phalacrocoracidae | Phalacrocoracidae |
| สถานะการอนุรักษ์ | Least Concern | Vulnerable |
| ความยาว | 90.0 cm (35.4 in) | — |
| กว้างปีก | 145.0 cm (57.1 in) | 56.7 cm (22.3 in) |
| น้ำหนัก | 2600.0 g (91.71 oz) | 2368.75 g (83.56 oz) |
| อาหาร | Fish caught by diving from the surface. Pursues prey underwater using powerful feet for propulsion. … | -- |
| จำนวนไข่ | 1-7 | 2-3 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Great Cormorant
Coasts, estuaries, lakes, rivers, and reservoirs. Nests in colonies in trees, on cliffs, or on the ground.
Song & Call Comparison
Great Cormorant
Deep, guttural grunts and 'karrr' calls at colonies. Bill-clicking and hissing in threat displays. Silent at sea. Colonial noise can be deafening during the breeding season.
Stewart Island Shag
Geographic Range & Migration
Great Cormorant
Very wide range across Europe, Asia, Africa, and Australasia. One of the most widespread cormorant species.
Stewart Island Shag
สถานะการอนุรักษ์
Great Cormorant
Stewart Island Shag
How to Tell Them Apart
Great Cormorant
All black with a bronze-green gloss. White throat patch and white thigh patches in breeding season. Yellow-orange face patch around the bill base.
Long, hooked, dark bill with a yellow gape
Stewart Island Shag
About These Birds
Great Cormorant
The great cormorant is one of the most widespread seabirds in the world. Unlike most waterbirds, cormorants lack fully waterproof plumage, leading to the iconic pose of standing with wings spread open to dry. In Asia, cormorants have been used by fishermen to catch fish for over a thousand years.
Stewart Island Shag
68 cm. Black and white pied shag; dark forms also occur; orange caruncles. Endemic to Stewart Island and southern South Island coast, New Zealand. Vulnerable; feeds on fish in cold coastal waters. Colonial nester on cliff ledges; closely related to other New Zealand endemic shags.