Insect Encyclopedia
Callibaetis
Callibaetis spp.
Baetidae
MayflyHook #14-188-12 mm body
Peak activity
JanFebMarAprMayJunJulAugSepOctNovDec
Nymph
Slender body with gills along the abdomen; clings to rocks in current.
Adult
Upright sail-like wings; two or three tail filaments.
Habitat & hatch
Found in lake littoral zones and reservoirs, most commonly in weedy littoral areas. Weed beds. Nymphs rise through the water column; duns ride the surface before flying to vegetation.
Timing
Individual emergence windows typically last 3 to 14 days. Strongest surface activity occurs around midday, and the afternoon.
Sources
- AB Fish Report synthesis from peer-reviewed Alberta and western North America literature.