Unknown flying black insect with narrow yellow and blue bands and a 'feathery' fan tail

Unknown flying black insect with narrow yellow and blue bands and a 'feathery' fan tail

Observation - Unknown flying black insect with narrow yellow and blue bands and a 'feathery' fan tail - Global. Description: Flying black insect with narrow yellow and blue bands and a 'feathery' fan tail. The body, tail and

Flying black insect with narrow yellow and blue bands and a 'feathery' fan tail. The body, tail and antennae shone with iridescence. Observed on blackberry flower.