Least Auklet vs Guadalupe Murrelet

In short

The Least Auklet and Guadalupe Murrelet are both small seabirds, but they can be distinguished by their plumage and structural features. The Least Auklet has a variable plumage with facial ornaments, while the Guadalupe Murrelet has distinctive white extending over the eye.

Identification tips

1. Look for white extending over the eye in Guadalupe Murrelets. 2. Check for facial ornaments and variable breast plumage in Least Auklets. 3. Observe body shape: Least Auklets are more compact, while Guadalupe Murrelets are slender. 4. Consider location: Least Auklets are in the North Pacific, Guadalupe Murrelets near Guadalupe Island.

Size

Both species are small, but the Least Auklet is generally more compact and stocky compared to the slender Guadalupe Murrelet.

Plumage

Least Auklets have variable plumage from white to nearly black on the breast, often with white facial plumes and a colorful bill. Guadalupe Murrelets have white that extends up in front of and often over the eye, providing a key distinguishing feature.

Behaviour

Least Auklets are known for diving for zooplankton and dense breeding colonies. Guadalupe Murrelets also dive for food but are less densely colonial.

Habitat

Least Auklets breed on remote Aleutian and Bering Sea islands, while Guadalupe Murrelets are found around Guadalupe Island and nearby waters.