Head, gills and legs of Yellow may dun Heptagenia sulphurea photographed in cross-polarised light with a wave retarder

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Size: 6048px × 4024px
Photo credit: © camera lucida wildlife / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: aquatic, biology, breathe, carmarthenshire, cross, cross-polarize, dun, europe, fauna, fresh, gills, head, heptagenia, invertebrate, leg, legs, light, macro, natural, polarise, retarder, river, riverfly, species, stream, sulphurea, uk, wales, water, world, yellow