Chalybion flebile is a species of mud dauber wasps belonging to the family Sphecidae.

[1][2] Chalybion flebile can reach a length of 11–14 millimetres (0.43–0.55 in) in the males, of 11–16 millimetres (0.43–0.63 in) in the females.

Head, thorax and abdomen are metallic blue-green.

[3] This species is present in Greece, Italy, Portugal, Spain, North Africa and in the Near East.

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