Sanderling vs Dunlin

In short

Sanderlings and Dunlins can be distinguished by their bill shape and plumage patterns. Sanderlings have a shorter, straighter bill and are paler in non-breeding plumage, while Dunlins have a longer, slightly decurved bill and a distinctive black belly patch in breeding plumage.

Identification tips

1. Bill Shape: Sanderlings have a shorter, straighter bill; Dunlins have a longer, slightly decurved bill. 2. Breeding Plumage: Look for the black belly patch on Dunlins. 3. Non-breeding Plumage: Sanderlings are paler and whiter compared to the grayer Dunlins. 4. Habitat: Check the habitat; Sanderlings prefer sandy beaches, while Dunlins are often on mudflats. 5. Behavior: Observe behavior; Sanderlings run along the shore, Dunlins probe mud.

Size

Both species are similar in size, but the Dunlin is slightly larger and bulkier than the Sanderling.

Plumage

In non-breeding plumage, Sanderlings are pale gray and white, while Dunlins are grayer with a more uniform appearance. In breeding plumage, Dunlins have a striking black belly patch and rufous back, whereas Sanderlings remain paler with less contrast.

Behaviour

Sanderlings are often seen running along the shoreline, following the waves, while Dunlins are more likely to be found probing mudflats or marshes.

Habitat

Sanderlings are typically found on sandy beaches and intertidal zones, whereas Dunlins prefer mudflats, estuaries, and coastal marshes.

Voice

Both species have similar calls, but Dunlins may produce a slightly more varied repertoire, including trills and whistles.