Black Fantail

I seem to be having a number of these cute wee things visit me each afternoon/evening (though I think they come here for the garden bugs rather than to see me!).  Today I counted at least 5.......and I think most of them were 'black' like this fella (as opposed to more regular fantail coloured like this fella).  Maybe there's a little family of them living nearby?  They regularly flit by very close to me which is so cute..........a pain to capture in an image, but cute nevertheless.