Least Grebe vs Pied-billed Grebe

The Least Grebe and Pied-billed Grebe can be distinguished by their size, bill shape, and plumage. The Least Grebe is smaller with a slender, pointed bill, while the Pied-billed Grebe is larger with a distinctive thick, bluish-white bill marked with a black bar during breeding season.

1. Size: Least Grebe is smaller. 2. Bill: Least Grebe has a slender, pointed bill; Pied-billed Grebe has a thick, bluish-white bill with a black bar in breeding season. 3. Plumage: Least Grebe is uniformly dark gray; Pied-billed Grebe is brown with a lighter throat. 4. Call: Listen for the Pied-billed Grebe's 'caow caow caow' call. 5. Habitat: Consider the habitat; Least Grebes are more tropical.

The Least Grebe is the smallest New World grebe, noticeably smaller than the Pied-billed Grebe.

Least Grebes have a more uniform dark gray plumage, whereas Pied-billed Grebes are brown with a lighter throat and a distinctive black band on their bill during breeding season.

Both species are adept divers, but the Pied-billed Grebe is more likely to be seen crash-diving or stealthily sinking out of view to escape danger.

Least Grebes prefer tropical and subtropical fresh and brackish waters, while Pied-billed Grebes are found in a wider range of freshwater habitats across the Americas, including marshes and sluggish rivers.

The Pied-billed Grebe has a distinctive far-reaching 'caow caow caow' call, which is often heard before the bird is seen. Least Grebe vocalizations are less documented.