This is Plebejus saepiolus, the Greenish Blue butterfly. It is shown at takeoff after nectaring on yarrow (Achillea millefolium).
The four frames are in sequence, 1/60 second apart.
The image capture was done by analog video camera at its "high speed sports" shutter setting -- about 1/4000 second.
Analog video is often described as 30 frames per second, but it is actually 60 fields per second, each field consisting of just the odd- or even-numbered scan lines. By post-processing to separate the fields, one can effectively get low resolution snapshots (320x240 pixels) at 60 per second as shown here.
Just to tie some things together, this butterfly is a close relative of Icaricia lupini, whose egg is pictured in an earlier posting. The egg of saepiolus is similar to lupini's, but somewhat less finely structured.
--Rik
