March Brown Dun (Rhithrogena morrisoni)
March Brown Dun (Rhithrogena morrisoni)
March Brown nymph
BWO dun (Baetis sp.)
BWO nymph (Baetis sp.)
BWO dun emerging (Baetis sp.)
BWO dun (Baetis sp.)
BWO dun (Baetis sp.)
BWO dun (Baetis sp.)
Male BWO dun (Baetis sp.)
PMD nymph (Ephemerella excrucians)
PMD dun (Ephemerella excrucians)
PMD dun (Ephemerella sp.)
PMD dun (Ephemerella excrucians)
PMD dun (Ephemerella excrucians)
Lesser Green Drake nymph (Drunella coloradensis)
Lesser Green Drake nymph (Drunella coloradensis)
Green Drake nymph (Drunella doddsi)
Green Drake nymph (Drunella grandis)
Green Drake nymph (Drunella grandis)
Green Drake dun (Drunella doddsi)
Green Drake spinner (Drunella grandis)
Green Drake dun (Drunella grandis)
Speckle-winged quill nymph (Callibaetis sp.)
Speckle-winged quill dun (Callibaetis sp.)
Speckle-winged quill spinner (Callibaetis sp.)
Speckle-winged quill duns (Callibaetis sp.)
Yellow May nymph (Epeorus sp.)
Pale Evening Dun (PED) nymph (Heptagenia sp.)
Pale Evening Dun (PED) nymph (Heptagenia sp.)
Pale Evening Dun (PED) dun (Heptagenia sp.)
Pale Evening Dun (PED) dun (Heptagenia sp.)
Pale Evening Dun (PED) dun (Heptagenia sp.)
Pale Evening Dun (PED) dun (Heptagenia sp.)
Pale Evening Dun (PED) dun molting (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Heptagenia sp. spinner
Leptophlebia sp. nymph
Leptophlebia sp. dun
Mahogany Dun nymph (Paraleptophlebia bicornuta)
Mahogany Dun nymph (Paraleptophlebia bicornuta)
Mahogany Dun dun (Paraleptophlebia sp.)
Mahogany Dun dun (Paraleptophlebia sp.)
Mahogany Dun dun (Paraleptophlebia sp.)
Mahogany Dun spinner (Paraleptophlebia sp.)
Black Drake nymph (Siphlonurus sp.)
Black Drake spinner (Siphlonurus sp.)
Brown Dun nymph (Ameletus sp.)
Brown Dun dun (Ameletus sp.)
Brown Dun dun (Ameletus sp.)
Brown Dun dun (Ameletus sp.)
Timpanoga hecuba nymph
Timpanoga hecuba nymph
Timpanoga hecuba spinner
Timpanoga hecuba spinner
Red Quill nymph (Cinygmula sp.)
Red Quill dun (Cinygmula sp.)
Red Quill dun (Cinygmula sp.)
Trico dun (Tricorythodes minutus)
Trico dun (Tricorythodes minutus)
Trico dun (Tricorythodes minutus)
Trico dun (Tricorythodes minutus)
Mayflies from trout stomach
Western Leadwing nymphal shuck (Isonychia sp.)
Hexagenia limbata nymph
Ametropus ammophilus nymph
Ametropus ammophilus nymph
Amelotopsidae from Chile
March Brown Dun (Rhithrogena morrisoni)
March Brown Dun (Rhithrogena morrisoni)
March Brown nymph
BWO dun (Baetis sp.)
BWO nymph (Baetis sp.)
BWO dun emerging (Baetis sp.)
BWO dun (Baetis sp.)
BWO dun (Baetis sp.)
Male BWO dun (Baetis sp.)
PMD nymph (Ephemerella excrucians)
PMD dun (Ephemerella excrucians)
PMD dun (Ephemerella sp.)
PMD spinner (Ephemerella excrucians)
PMD spinner (Ephemerella excrucians)
Lesser Green Drake nymph (Drunella coloradensis)
Lesser Green Drake nymph (Drunella coloradensis)
Green Drake nymph (Drunella doddsi)
Green Drake nymph (Drunella grandis)
Green Drake nymph (Drunella grandis)
Green Drake dun (Drunella doddsi)
Green Drake spinner (Drunella grandis)
Green Drake dun (Drunella grandis)
Speckle-winged quill nymph (Callibaetis sp.)
Speckle-winged quill dun (Callibaetis sp.)
Speckle-winged quill spinner (Callibaetis sp.)
Speckle-winged quill duns (Callibaetis sp.)
Yellow May nymph (Epeorus sp.)
Pale Evening Dun (PED) nymph (Heptagenia sp.)
Pale Evening Dun (PED) nymph (Heptagenia sp.)
Pale Evening Dun (PED) dun (Heptagenia sp.)
Pale Evening Dun (PED) dun (Heptagenia sp.)
Pale Evening Dun (PED) dun (Heptagenia sp.)
Pale Evening Dun (PED) dun (Heptagenia sp.)
Pale Evening Dun (PED) dun molting (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Pale Evening Dun (PED) spinner (Heptagenia sp.)
Heptagenia sp. spinner
Leptophlebia sp. nymph
Leptophlebia sp. dun
Mahogany Dun nymph (Paraleptophlebia bicornuta)
Mahogany Dun nymph (Paraleptophlebia bicornuta)
Mahogany Dun dun (Paraleptophlebia sp.)
Mahogany Dun dun (Paraleptophlebia sp.)
Mahogany Dun dun (Paraleptophlebia sp.)
Mahogany Dun spinner (Paraleptophlebia sp.)
Black Drake nymph (Siphlonurus sp.)
Black Drake spinner (Siphlonurus sp.)
Brown Dun nymph (Ameletus sp.)
Brown Dun dun (Ameletus sp.)
Brown Dun dun (Ameletus sp.)
Brown Dun dun (Ameletus sp.)
Timpanoga hecuba nymph
Timpanoga hecuba nymph
Timpanoga hecuba spinner
Timpanoga hecuba spinner
Red Quill nymph (Cinygmula sp.)
Red Quill dun (Cinygmula sp.)
Red Quill dun (Cinygmula sp.)
Trico dun (Tricorythodes minutus)
Trico dun (Tricorythodes minutus)
Trico dun (Tricorythodes minutus)
Trico dun (Tricorythodes minutus)
Mayflies from trout stomach
Western Leadwing nymphal shuck (Isonychia sp.)
Hexagenia limbata nymph
Ametropus ammophilus nymph
Ametropus ammophilus nymph
Amelotopsidae from Chile