Mayfly · Aquatic insect
Callibaetis
Callibaetis ferrugineus
Size
6–9mm
Hook size
#16–14
Hatch window
Season May–SeptemberPeak time 10:00–14:00
Water temperature
16° peak
12°22°
Hatches from 12°C, peaking at 16°C, tailing off by 22°C.How fish feed on it
The speckled spinner falls in the morning, spent and flat on still water. On a calm lake you will see the fish before you see the flies.
Flies that imitate this
Callibaetis Cripple
Callibaetis Spinner
Sheep Creek Special
Ecology
Where you'll find this
- North America — WestPresent
- North America — EastPresent
Present throughout
Identification
Callibaetis ferrugineus is a species of small minnow mayfly in the family Baetidae. It is found in southwestern and northern Canada and the western United States and Alaska.