Galapagos Shearwater vs Sargasso Shearwater

In short

Galapagos Shearwater and Sargasso Shearwater are both part of the 'small black-and-white' shearwater complex, making them challenging to distinguish. Key differences lie in their flight style and subtle plumage variations. Observing these birds in their respective habitats can also aid identification.

Identification tips

1. Observe flight style: Galapagos Shearwater has fast wing-beats with short glides. 2. Note habitat: Galapagos Shearwater is more likely near the Galapagos Islands. 3. Check plumage contrast: Galapagos Shearwater may appear more uniformly black-and-white. 4. Consider location and range to rule out one species.

Size

Both species are similar in size, typical of small shearwaters.

Plumage

Galapagos Shearwater exhibits a more uniform black-and-white contrast, while Sargasso Shearwater may show slightly more variation in plumage tones. However, these differences are subtle and require careful observation.

Behaviour

Galapagos Shearwater flies low over the water with very fast wing-beats interspersed with short glides. Sargasso Shearwater's flight style is less documented but may show similar patterns.

Habitat

Galapagos Shearwater is typically found in the Galapagos Islands and off the coast of Central America, while Sargasso Shearwater is more associated with tropical and subtropical waters.