Guanay Cormorant vs Antarctic Shag
Leucocarbo bougainvilliorum compared with Leucocarbo bransfieldensis
Side-by-Side Comparison
| Attribute | Guanay Cormorant | Antarctic Shag |
|---|---|---|
| Scientific Name | Leucocarbo bougainvilliorum | Leucocarbo bransfieldensis |
| Order | Suliformes | Suliformes |
| Family | Phalacrocoracidae | Phalacrocoracidae |
| Conservation Status | Near Threatened | Not Evaluated |
| Length | — | — |
| Wingspan | 58.6 cm (23.1 in) | — |
| Weight | 2280.5 g (80.44 oz) | 2780.0 g (98.06 oz) |
| Diet | -- | -- |
| Clutch Size | 2-3 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Near Threatened
Guanay Cormorant
Not Evaluated
Antarctic Shag
About These Birds
Guanay Cormorant
76 cm. Black above; white underparts; black facial skin; yellow bill. Breeds Peruvian and Chilean coast; one of the most abundant South American seabirds. Feeds on anchovy in Humboldt Current. Produces massive guano deposits; colonies of millions historically. Near Threatened; sensitive to El Niño.
Antarctic Shag
63–72 cm. Black above; white below; caruncles reduced compared to related shags. Breeds on the Antarctic Peninsula and associated islands. Feeds on fish in cold Antarctic coastal waters. One of the southernmost-breeding cormorants; largely sedentary around breeding colonies.