Least Auklet vs Rhinoceros Auklet
Aethia pusilla compared with Cerorhinca monocerata
Side-by-Side Comparison
| Attribute | Least Auklet | Rhinoceros Auklet |
|---|---|---|
| Scientific Name | Aethia pusilla | Cerorhinca monocerata |
| Order | Charadriiformes | Charadriiformes |
| Family | Alcidae | Alcidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 18.9 cm (7.4 in) | 35.8 cm (14.1 in) |
| Weight | 84.33333333333333 g (2.97 oz) | 503.75 g (17.77 oz) |
| Diet | -- | -- |
| Clutch Size | 1 | 1 |
| Population Trend | — | — |
Habitat Comparison
Conservation Status
Least Concern
Least Auklet
Least Concern
Rhinoceros Auklet
About These Birds
Least Auklet
Least Auklet, 15–16 cm, is the smallest auk, breeding in immense colonies (millions) on rocky Aleutian and Bering Sea islands. Dark above, streaked white below; a tiny white plume above the eye. Planktivore; sieves copepods and euphausiids at sea. Makes loud buzzing display choruses at colony.
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.