Very rare where BLTE occur. Very similar to BLTE but slightly chunkier with shorter thicker bill. White tail in all plumages. ID: Adult br: noticeably 2-tone: black underwing coverts, whitish tail, and white upperwing coverts contrasting with dark body. Red legs. 1st-s/nonbr: paler upperparts than BLTE with whitish rump, white underparts lacking breast patch or dusky flanks. Isolated cheek spot reminiscent of BOGU.