|Red Knot in breeding plumage (right), easily identifiable from Great Knot by extensive red on face and underparts.|
|Great Knot moulting out of breeding plumage, easily identified from Red Knot by extensive black breast markings and lack of red colouration on underparts.|
Identification of birds not in breeding plumage can be more problematic, and these plumages are the most commonly encountered in WA, particularly in the south. The following features are useful for separating the two species in non-breeding plumage. Structural features mentioned below, like bill length, are still applicable in breeding plumage, but plumage features aren’t. Several plumage features are also applicable to juvenile plumage, generally mention will be made of differences. As always, there can be significant individual variation in many of the features mentioned here, so we advise observers to use a combination of features to confirm identity.