Blue Long-horned Snailkiller

Sepedon sphegea

"Sepedon sphegea" is a Palearctic species of fly in the family Sciomyzidae, the marsh flies or snail-killing flies. The larva feeds on aquatic snails and as an opportunist on other invertebrates.
Snail-killing Fly (Sepedon sphegea) This was one of those 'risky, but ultimately worth it' moments, as I perched precariously on what felt like a very unstable mound of grass, right on the edge of a river, streching to catch sight of what was moving, many feet away, further along the bank, almost out of sight.

I got video too.............https://www.youtube.com/watch?v=Fs2q2IvaKhs Geotagged,Sepedon sphegea,Summer,United Kingdom

Habitat

The habitat of this species includes among many others, pond margins and damp meadows. It has a particular fondness for "Iris pseudacorus" which grow at the edges of the pond. Adults can be found all year long but the main flight period is from March to October.

References:

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Taxonomy
KingdomAnimalia
DivisionArthropoda
ClassInsecta
OrderDiptera
FamilySciomyzidae
GenusSepedon
SpeciesS. sphegea