Northern Fulmar vs Soft-plumaged Petrel

The Northern Fulmar and Soft-plumaged Petrel can be distinguished by their structure and plumage. The Northern Fulmar has a stockier build with a thicker neck and a more robust bill, while the Soft-plumaged Petrel is sleeker with a more slender bill. Plumage differences are subtle but notable, especially in the light morphs.

1. Structure: Look for the Northern Fulmar's thicker neck and robust bill compared to the sleeker Soft-plumaged Petrel. 2. Plumage: Note the Northern Fulmar's more uniform light coloration versus the Soft-plumaged Petrel's contrasting dark cap and white face. 3. Behavior: Observe flight style; Northern Fulmars glide stiffly, while Soft-plumaged Petrels are more agile. 4. Habitat: Consider location; Northern Fulmars are more northern and coastal, whereas Soft-plumaged Petrels are southern and pelagic.

Northern Fulmar is generally bulkier and more robust than the Soft-plumaged Petrel.

Northern Fulmar typically shows a uniform light gray or white head and body in light morphs, while the Soft-plumaged Petrel has a more contrasting pattern with a darker cap and a distinct white face.

Northern Fulmars often glide with stiff wings and are more likely to be seen following ships, whereas Soft-plumaged Petrels are more agile in flight and less associated with ships.

Northern Fulmars are commonly found in colder northern waters, often near cliffs, while Soft-plumaged Petrels are more pelagic and can be found in southern oceans.

Vocalizations are not a reliable field mark as both species are generally silent at sea.