Kebnat

Maccaffertium

4 species

In Québec, the genus Maccaffertium (family Heptageniidae) counts 4 species of insects. The stars? March flat-headed mayfly, Modest flat-headed mayfly and Terminal flat-headed mayfly, the most often observed. The richest region: Montréal, with 4 species. Every species has its own page: photos, its season, its habitat and the best places to see it near you.

Species observed by region

Where do the observations come from?

  • Mostly iNaturalist : photos taken by people all over Québec, with the species confirmed by the community.
  • Other public sources : such as eBird for birds and the provincial forest inventories, gathered by GBIF, the global biodiversity data network.
  • What we keep : confirmed observations, with an exact position (not blurred to protect a rare species), that their author allows to be reused.
  • One place counts once : several observations of the same species at the same spot (within 11 m) count as one.
  • So our numbers are lower : than iNaturalist’s total. A region without observations does not mean the species does not live there.

Data downloaded in September 2026.

  1. Montréal4
  2. Capitale-Nationale3
  3. Mauricie3
  4. Chaudière-Appalaches3
  5. Lanaudière3
  6. Montérégie3
  7. Nord-du-Québec2
  8. Laurentides2
  9. Bas-Saint-Laurent1
  10. Estrie1
  11. Outaouais1
  12. Côte-Nord1
  13. Gaspésie–Îles-de-la-Madeleine1
  14. Laval1
  15. Centre-du-Québec1

Maccaffertium 4

Ephemeroptera
All4,550Lepidoptera2,108Coleoptera1,199Hemiptera482Hymenoptera230Diptera210Odonata151Orthoptera61Trichoptera35Ephemeroptera23Neuroptera21Mecoptera9Blattodea7Plecoptera7Dermaptera4Mantodea2Phasmida1
Heptageniidae
All23Heptageniidae11Baetidae4Ephemeridae3Ephemerellidae2Leptophlebiidae2Isonychiidae1
March flat-headed mayfly46 observations
Modest flat-headed mayfly28 observations
Terminal flat-headed mayfly25 observations
Spotted flat-headed mayfly6 observations