Magenta winged insect

Magenta winged insect

Observation - Magenta winged insect. Description: No response from iSpot since 2011. Recently saw and photographed dying possible; book of moths

No response from iSpot since 2011. Recently saw and photographed dying "possible"; book of moths containing several possible IDs, of which imho image3, Zygaena filipendulae, is the most likely. Do you agree?
In unmown grassy wildflower meadow, calm sunny afternoon. Fly, about 20mm wingspan, wings bright magenta, body "heavy" so agility roughly like a bumble bee's. About 6 seen, ignoring each other. Seen same place last year [2010] too.