Thecla marius
In 3 days ~70% in a week >90%
Rekoa marius, the Marius hairstreak, is a butterfly in the family Lycaenidae. It is found from Paraguay north to Sonora in Mexico. Strays may be found as far north as southern Texas. The species used to be considered rare in the southern Texas. It is the species of Rekoa found in Arizona. The habitat consists of disturbed tropical areas.
The wingspan is 22–32 mm. The upperside of the males is dark iridescent blue. Females are gray. The hindwing has an orange eyespot near the tail. Adults are probably on wing year round in Mexico. In southern Texas, there is one flight with adults on wing from September to December. They feed on flower nectar.
The larvae feed on various plants, including legumes and malpighias. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Ría Lagartos Biosphere Reserve | 🇲🇽 Mexico |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Manaus | 🇧🇷 Brazil | |
| 2 | Maceió | 🇧🇷 Brazil | |
| 3 | Panama City | 🇵🇦 Panama | |
| 4 | Monterrey | 🇲🇽 México | |
| 5 | Buenos Aires | 🇦🇷 Argentina | |
| 6 | São Paulo | 🇧🇷 Brazil |
Likely
About 40% of wildlife watchers report a Thecla marius sighting in Ría Lagartos Biosphere Reserve on a given day, based on 79 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 112 insects we can rate there. Over three days the chance rises to about 70%, and over a week to over 90%, if each day is a fresh chance.
February
In that month about 60% of wildlife watchers report a Thecla marius in Ría Lagartos Biosphere Reserve on a given day, against under 5% in April, August–September and November, the lowest months. That is one of Ría Lagartos Biosphere Reserve's driest months, with about 20 mm of rain against 150 mm in June.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Thecla marius sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Only Ría Lagartos Biosphere Reserve, in our data
Ría Lagartos Biosphere Reserve is the only park on Wallace's Line with enough records to rate Thecla marius sightings: about 40% of wildlife watchers there report one on a given day.
Same genus: Thecla
The closest relatives of the Thecla marius that you can see in Ría Lagartos Biosphere Reserve (genus Thecla) are Thecla bathildis (about 40%), Thecla yojoa (about 30%) and Thecla rufofusca (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Thecla marius is recorded against all the insects logged in Ría Lagartos Biosphere Reserve (79 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
