Paíño Menudo vs Fulmar Boreal

The Least Storm-Petrel and Northern Fulmar are easily distinguished by size and structure. The Least Storm-Petrel is much smaller and more delicate, while the Northern Fulmar is robust and gull-like in appearance.

Size and structure: The Least Storm-Petrel is small and delicate, while the Northern Fulmar is large and robust. Plumage: Look for the uniformly dark plumage of the Least Storm-Petrel versus the potential light morph of the Northern Fulmar.

The Least Storm-Petrel is significantly smaller than the Northern Fulmar, which is a much larger and bulkier bird.

The Least Storm-Petrel has a uniformly dark plumage, whereas the Northern Fulmar can exhibit a variety of plumage morphs, including light and dark morphs.