Michigan Flies

Hatches

34 insects that matter on Michigan rivers. Windows shown are the Au Sable baseline; the calendar and river pages shift them for your water.

Mayflies

Hendrickson
Hendrickson
A
Ephemerella subvaria
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Apr 20 – May 20#12–14
Blue-Winged Olive
Blue-Winged Olive
A
Baetis tricaudatus and other Baetidae
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Apr 15 – Oct 24#16–22
Blue Quill
Blue Quill
A
Neoleptophlebia adoptiva (formerly Paraleptophlebia adoptiva)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Apr 15 – Jul 8#16–18
Black Quill
Black Quill
A
Leptophlebia cupida
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Apr 20 – Jun 15#10–14
Sulphur
Sulphur
A
Ephemerella invaria (= E. rotunda)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Jul 8#12–16
Little Sulphur
Little Sulphur
A
Ephemerella dorothea dorothea
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Jul 15#16–20
Tiny Blue-Winged Olive
Tiny Blue-Winged Olive
A
Plauditus and Acentrella spp. (formerly Pseudocloeon) and other small Baetidae
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Aug 30#20–26
Quill Gordon
Quill Gordon
A
Epeorus pleuralis (identity per the Muskegon chart; not confirmed for northern rivers)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 24 – Jul 12#12–14
March Brown
March Brown
A
Maccaffertium vicarium (formerly Stenonema vicarium and S. fuscum)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Jul 20#8–12
Great Speckled Olive
Great Speckled Olive
A
Drunella sp. (identity unconfirmed by any Michigan source)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Jul 15#8–14
Gray Drake
Gray Drake
A
Siphlonurus quebecensis (also S. alternatus, S. rapidus)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 20 – Jul 15#8–12
Isonychia
Isonychia
A
Isonychia bicolor (also I. sadleri)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Sep 30#8–14
Light Cahill
Light Cahill
A
Stenacron interpunctatum and Maccaffertium spp. (species not confirmed by Michigan sources)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Jun 5 – Aug 14#10–14
Brown Drake
Brown Drake
A
Ephemera simulans
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Jun 1 – Jul 4#8–12
Hex
Hex
S
Hexagenia limbata
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Jun 10 – Jul 10#4–8
Bat Fly
Bat Fly
A
Baetisca spp.
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Jun 1 – Jun 30#16–18
Trico
Trico
A
Tricorythodes spp.
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Jul 20 – Oct 20#20–26
White Fly
White Fly
A
Ephoron leukon and E. album
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Aug 14 – Sep 30#10–16
Mahogany Dun
Mahogany Dun
A
Paraleptophlebia / Neoleptophlebia spp., fall brood (species not confirmed by Michigan sources)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Sep 1 – Oct 31#16–18

Caddisflies

Green Rock Worm
Green Rock Worm
A
Rhyacophila spp. (R. fuscula, R. manistee and others in Michigan)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
All year#12–16
Little Black Caddis
Little Black Caddis
A
Chimarra aterrima
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Apr 20 – Jun 30#16–20
Grannom
Grannom
A
Brachycentrus spp. (B. americanus, B. numerosus, B. lateralis and others in Michigan)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Apr 20 – Jul 31#12–16
Tan Caddis
Tan Caddis
A
Hydropsyche spp. (20+ Michigan species) and Ceratopsyche spp.
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 1 – Sep 30#12–18
Little Sister Sedge
Little Sister Sedge
A
Cheumatopsyche spp. (C. speciosa, C. campyla, C. analis and others in Michigan)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 1 – Jul 31#10–20
White Miller
White Miller
A
Nectopsyche spp. (N. albida on the Muskegon)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Jul 1 – Sep 30#12–16
October Caddis
October Caddis
A
Pycnopsyche lepida (and P. guttifer, P. subfasciata)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Aug 1 – Oct 31#8–14

Stoneflies

Tiny Black Stonefly
Tiny Black Stonefly
A
Allocapnia spp. (A. granulata, A. pygmaea, A. vivipara, A. minima in Michigan)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Jan 1 – Apr 30#16–20
Early Black Stonefly
Early Black Stonefly
A
Taeniopteryx nivalis (also T. burksi, T. parvula)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Feb 21 – Apr 30#10–16
Early Brown Stonefly
Early Brown Stonefly
A
Strophopteryx fasciata and Taeniopteryx spp. (identity inferred; no Michigan source names it)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
Mar 15 – May 10#10–14
Little Yellow Sally
Little Yellow Sally
A
Isoperla spp. (I. bilineata and 11 other Michigan species)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 1 – Jun 30#10–16
Golden Stonefly
Golden Stonefly
A
Acroneuria lycorias, A. abnormis and Paragnetina media
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Aug 7#4–8
Giant Black Stonefly
Giant Black Stonefly
A
Pteronarcys dorsata
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Jun 30#2–8

Midges

Midge
Midge
A
Chironomidae (species not identified by any Michigan river source)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
All year#20–28

Other aquatic insects

Crane Fly
Crane Fly
A
Tipulidae (Tipula and related genera; species not identified by Michigan sources)
  1. J
  2. F
  3. M
  4. A
  5. M
  6. J
  7. J
  8. A
  9. S
  10. O
  11. N
  12. D
May 15 – Jul 8#8–16