Black Guillemot vs Rhinoceros Auklet
Cepphus grylle compared with Cerorhinca monocerata
Side-by-Side Comparison
| Attribute | Black Guillemot | Rhinoceros Auklet |
|---|---|---|
| Scientific Name | Cepphus grylle | Cerorhinca monocerata |
| Order | Charadriiformes | Charadriiformes |
| Family | Alcidae | Alcidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 30.8 cm (12.1 in) | 35.8 cm (14.1 in) |
| Weight | 421.8666666666666 g (14.88 oz) | 503.75 g (17.77 oz) |
| Diet | -- | -- |
| Clutch Size | 1-2 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Black Guillemot
Least Concern
Rhinoceros Auklet
About These Birds
Black Guillemot
Black Guillemot, 30–32 cm, is a compact North Atlantic alcid, distinctive in summer: entirely black with bold white wing patches and vivid red feet. Resident on rocky Arctic and boreal shores year-round; does not undertake long pelagic migrations. Dives to 50 m for blennies and sand eels near shore.
Rhinoceros Auklet
Rhinoceros Auklet, 37–41 cm, breeds colonially in burrows on North Pacific islands from California to Japan. Adults develop a prominent horn at bill base in breeding plumage plus white facial plumes. Nocturnal at colonies. Piscivore; dives up to 50 m for sand lance and herring. Winters at sea.