The male Blue Rock Thrush is unmistakable, with all blue-grey plumage apart from its darker wings.
Females and immatures are much less striking, with dark brown upperparts, and paler brown scaly underparts.

1st, 2nd & 3rd photo: A male. Cat Ba Island, Vietnam, 7 January 2024
4th & 5th photo: A juvenile. Thung Nham Bird Park, Ninh Binh, Vietnam, 10 January 2024