Watching from a crag over the stony slopes of southern Europe, the lone figure of the male Blue Rock Thrush Montkok solitarius (plates 39-40) is a handsome sight with blue-grey body and slaty-black wings and tail. In winter many feathers hare brownish fringes which wear off by spring, except in some first-year males, to expose a brighter and more uniform blue. The female (plates 41-42a) is bluish-...

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