Bug FAQRed-bordered Satyr
Gyrocheilus patrobas · Order: Lepidoptera · Family: Nymphalidae
The red-bordered Satyr is the only species in the genus Gyrocheilus and is a brown butterfly with a wingspan of about 5 to 6 cm. It lives beside streams in open coniferous mountain forests of central and southern Arizona and Mexico, and its caterpillars feed on the grass Muhlenbergia emersleyi. Adults appear once a year from mid-August through October.
Source: Wikipedia
How to recognize it
Gyrocheilus is a genus with only one species, Gyrocheilus patrobas, known as the red-bordered brown.
Source: Wikipedia
Size
Its wingspan ranges from 51 to 60 mm.
Source: Wikipedia
Where it lives
It is found along streams in open coniferous forests in mountainous areas.
Source: Wikipedia
What it eats
Caterpillars feed on the grass Muhlenbergia emersleyi.
Source: Wikipedia
Life cycle
There is one generation each year, with adults on the wing from mid-August to October.
Source: Wikipedia
When you see it
Adults are active from mid-August through October.
Source: Wikipedia
Where it comes from
The species occurs in North America, specifically central and southern Arizona and Mexico.
Source: Wikipedia
Where it is found in the US
Recorded in 2 of 51 states and DC. Most records: Arizona, New Mexico.
Darker = more records. Counts are museum and citizen-science records, not population size.
Source: GBIF
Months it is reported in the US
Source: GBIF
More photos
Questions people ask
Where can I find this butterfly?
It lives beside streams in open coniferous mountain forests of central and southern Arizona and Mexico.
Source: Wikipedia
Same family (Nymphalidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Gyrocheilus
Look it up elsewhere: GBIF · iNaturalist · BugGuide · ITIS · Wikipedia
Text written 2026-10-24 from the sources above and checked sentence by sentence against them. Data fetched 2026-10-24.