Caspian Gull vs Lesser Black-backed Gull

The Caspian Gull and Lesser Black-backed Gull can be distinguished by their wing and back coloration. Caspian Gulls have paler grey upperparts compared to the darker slate-grey of the Lesser Black-backed Gull. Structural differences include the Caspian Gull's longer legs and more elongated bill.

1. Check the back color: Caspian Gulls are paler grey, Lesser Black-backed Gulls are darker slate-grey. 2. Look at the head: Caspian Gulls have a cleaner white head in winter. 3. Note the structure: Caspian Gulls have longer legs and a more elongated bill. 4. Consider the habitat: Caspian Gulls are more often found inland. 5. Listen for calls: Caspian Gulls have deeper calls.

Caspian Gull is generally larger and bulkier compared to the Lesser Black-backed Gull.

Caspian Gulls have paler grey upperparts and a more uniform white head in winter, while Lesser Black-backed Gulls exhibit darker slate-grey upperparts and often have streaked heads in winter.

Both species have similar behaviors, often seen in large flocks and scavenging, but Caspian Gulls may appear more solitary.

Both species are found in coastal areas, but Caspian Gulls are more frequently seen inland near large lakes and rivers.

Caspian Gulls have a deeper, more resonant call compared to the higher-pitched calls of the Lesser Black-backed Gull.