Juvenile Thrush?

Juvenile Thrush?

Observation - Juvenile Thrush?. Description: There are two of these birds in the garden both of which are quite aggressive towards each other and aggressive to blackbirds. They are Blackbird size but don't have the intense black plumage. The plumage is a dark flat grey. The breast has feint thrush l

There are two of these birds in the garden both of which are quite aggressive towards each other and aggressive to blackbirds. They are Blackbird size but don't have the intense black plumage. The plumage is a dark flat grey. The breast has feint thrush like markings. The birds have been visiting our garden for several months with no change to their markings. The legs and beak also have the same dull colour as the plumage.