Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Fall Fund Drive


Genus Callibaetis

Mayfly - Callibaetis? - Callibaetis floridanus ukn - Callibaetis - male Mayfly - Callibaetis pictus New insect to ID - Callibaetis ferrugineus Insect for ID - Callibaetis ferrugineus Tiny mayfly near outdoor light at night in early March - Callibaetis Mayfly - Callibaetis ferrugineus small minnow mayfly - Callibaetis pretiosus - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Ephemeroptera (Mayflies)
Suborder Pisciforma
Family Baetidae (Small Minnow Mayflies)
Genus Callibaetis
Explanation of Names
Callibaetis Eaton 1881
12 spp. in our area(1), 30 spp. total(2)
Female imagoes usually with intensely colored leading edge of the forewing, males may have this coloration less pronounced or lacking; subimagoes typically have dull grey, brown, or tan wings with a network of pale veins (based on Lloyd Gonzales's comment).
"Following mating, female imagoes of genera Callibaetis and Cloeon seek a safe place to remain stationary for five days or so, until their eggs have matured. Once their eggs are mature, the female imago flies off to land on the water, and deposit her load of eggs, which immediately start hatching. This behavior is unique to genera Callibaetis and Cloeon, as the eggs of other mayfly genera require up to two weeks following oviposition to begin hatching.
" (Roger Rohrbeck's comment here).
New World, more diverse in the Neotropics(2)