Clark's Grebe vs Sooty Shearwater

Clark's Grebe and Sooty Shearwater are distinct in both appearance and habitat. Clark's Grebe is a freshwater bird with a striking black-and-white plumage, while the Sooty Shearwater is a pelagic bird with uniformly dark plumage. These differences make them easy to distinguish in the field.

Check habitat first: Clark's Grebe is on freshwater, Sooty Shearwater is over the ocean. Look at plumage: Clark's Grebe has a white face and red eyes; Sooty Shearwater is uniformly dark. Observe behavior: Clark's Grebe dives in freshwater; Sooty Shearwater glides over the sea.

Clark's Grebe is a medium-sized grebe, while the Sooty Shearwater is a larger seabird.

Clark's Grebe has a contrasting black-and-white plumage with a white face and red eyes. In contrast, the Sooty Shearwater is uniformly dark brown or sooty in color with no distinct facial markings.

Clark's Grebe is often seen swimming on freshwater lakes, diving for fish. Sooty Shearwater is typically observed gliding over the ocean, often in large flocks.

Clark's Grebe inhabits freshwater lakes and marshes, while Sooty Shearwater is found over open oceans, especially in the Southern Hemisphere.

Clark's Grebe has a series of trilling calls, whereas Sooty Shearwater is generally silent at sea, with vocalizations mainly heard at breeding colonies.