They have a long black tail with white outer feathers.

The outer feathers of the long tail are also white.

The outer feathers are slightly longer in the male than the female.

The tail is relatively long and black with white outer feathers.

The tail is fairly short with little or no white on the outer feathers.

There is very little white on the tips of the outer two tail feathers.

The wings may have black spots, and the outer tail feathers are white.

It usually does not have any white spots on the tips of the outer tail feathers.

The tail is graduated and the outer feathers are tipped in white.

The tail is dark grey with white tips to the outer feathers.