Red-footed Booby vs Nazca Booby

The Red-footed Booby and Nazca Booby can be distinguished by their distinct bill and leg colors. The Red-footed Booby shows a variety of plumage morphs, but its red legs and blue bill base are key identifiers. The Nazca Booby, on the other hand, has a more uniform white body with a yellow bill and black tail and wingtips.

1. Leg Color: Red-footed Booby has red legs; Nazca Booby has yellowish legs. 2. Bill Color: Red-footed Booby has a blue bill base; Nazca Booby has a yellow bill. 3. Size and Structure: Nazca Booby is larger and more robust. 4. Plumage: Look for color morphs in Red-footed Booby; Nazca Booby is more uniformly white with black wingtips.

The Nazca Booby is generally larger and more robust than the Red-footed Booby.

Red-footed Boobies exhibit multiple color morphs, ranging from all white to chocolate brown, but always have red legs. Nazca Boobies are predominantly white with black on the tail and wingtips, and do not show the same variation in plumage.

Both species are seabirds that plunge-dive for fish, but the Red-footed Booby is more agile in flight due to its smaller size.

Red-footed Boobies are more likely to be found in tropical and subtropical regions, often nesting in trees, while Nazca Boobies prefer open ground on islands, particularly in the eastern Pacific.

Vocalizations are not a primary distinguishing feature between these two species.