And another video. I am using my iPhone and Olloclip lens for the pics above and this video - so no tripod involved. VERY hard to stay still enough and stay in focus - but my goal was to show you how this Hairstreak butterfly rubs his wings together. From my reasearch I found out this:
Hairstreaks usually have a pattern of lines or stripes on the
underside wings. These, in combination with ocelli ( false eye
markings ) and short tails ( false antennae ) act to divert
attention away from the head, and towards the outer edge of the
hindwings. By oscillating the wings, the tails are made to wiggle
like antennae, further increasing the illusion that the butterfly is
'back
to front'.
Attacking birds will always aim at the head of a butterfly, but are
tricked into aiming at the tail. The butterfly is thus able to
escape in the opposite direction unharmed. Another reason for
wing-rubbing is that male Hairstreaks have patches of specialised
wing scales - 'androconia',
located on their upperside forewings. Sacs at the base of these
scales contain pheromones. Rubbing the wings together helps to
disseminate the pheromones, which attract females and induce them to
mate.