Curlew Sandpiper look-alikes

Key differences

Dunlin has a less decurved bill, typically shorter. In breeding plumage, Dunlin has a black belly patch, which Curlew Sandpiper lacks (it's uniformly red). In non-breeding plumage, Dunlin is generally darker grey above and lacks the strong white supercilium of Curlew Sandpiper. Dunlin's call is a harsher 'kreep'.

Key differences

Red-necked Stint is much smaller and has a short, straight bill. Its breeding plumage is rufous on the face and breast, but not the deep brick-red of Curlew Sandpiper's underparts. Non-breeding plumage is very similar to other small 'stints'.

Key differences

Sanderling is paler overall, especially in non-breeding plumage, appearing almost pure white below and very pale grey above. It has a shorter, straighter bill and lacks a hind toe. Its feeding behavior is distinctive, often running along the water's edge.