snail-killing fly on milk thistle purple flowers

animal animals arachnid arachnids bug bugs colour creature critter critters daylight daytime detail detailed details entomology environment europe field flies flowers fly free grass green group hidden hiding insect insects lush marsh meadow mediterranean milk milkthistle natural nature outdoors outside parasite parasitic pherbellia plant plants pollen pollinating pollinator purple purpur sits sitting small snailkilling southern springtime thistle vegetation wild wildflowers wildlife