Males usually unmistakable: dark blue all over, but may appear all dark at a distance. Females dark brown above, vermiculated (finely barred) below. Silhouette distinctive given long bill, wings, and tail, which makes for a very different shape than Rufous-tailed Rock-Thrush. Songs of these two species are similar: melodic and Eurasian Blackbird-like. Breeds in mountainous regions but also sea cliffs, ruins, quarries, and even towns; winters in a variety of open rocky habitats.