Very common. Appears to breed early in March, as full fledged young were about in the middle of April.

All the specimens show a narrow circle of white feathers round the eye; and many of them have pale greyish white margins to the secondaries and wing-coverts, and the under tail-coverts tipped with white. The pale margins are probably remains of the immature plumage (which is blackish grey, each feather more or less margined with white); but the white circle round the eye appears to be a permanent feature.