Bug Of The Week

- KINGDOM Animalia

- SUBKINGDOM Eumetazoa

- PHYLUM Arthropoda

- SUBPHYLUM Hexapoda

- CLASS Insecta

- ORDER Ephemeroptera

- FAMILY Baetidae

- GENUS Baetis

- SPECIES calcaratus

Baetis calcaratus  (Subimago  Male)

Most liklely found between

It was mid May and there was a moderate hatch started after midday that got more intense in the evening hours. A low land stone bottom river, 20 to 30 m. wide, with water weeds growth.

Very tiny mayfly. Body lenght was about 4 mm and front wing 6 mm.

Unfortunately the only specimen I brought home had a damaged wing and could not turn to imago. A closer view with the microscope confirmed a hind wing with small costal process and two divergent veins. The hind wing was > 3 times long than wide.