Animalia → Insecta → Heptageniidae
Grizzly Flat-Headed Mayfly
Ironodes arctus
Invertebrate Animals
ORBIC List 3S1?
State Rank
SX
S1
S2
S3
S4
S5
S1? — Critically Imperiled in Oregon
G1G2
Global Rank
Critically Imperiled
List 3
ORBIC
Sensitive / Vulnerable
What do these ranks mean? ORBIC's ranking definitions or NatureServe's conservation status categories
Ecoregions
Coast Range
Counties
Curry
Other states / provinces
BC
Range map
Certain
Possible
Extirpated
Absent