Bug FAQSonoran Blue
Philotes sonorensis · Order: Lepidoptera · Family: Lycaenidae
Adult Sonoran blues have a wingspan of about 22 to 25 mm. They live on desert cliffs, rocky washes and outcrops where their host plants grow. The larvae feed on Dudleya species, boring into the leaves.
Source: Wikipedia
How to recognize it
Males are mainly iridescent blue on the upper wings, while females are darker with less blue. Both sexes have orange and black markings that set them apart from other North American blues.
Source: Wikipedia
Size
The wingspan of an adult is 22 to 25 mm.
Source: Wikipedia
Where it lives
They inhabit rocky washes, outcrops and cliffs in desert areas. They prefer arid sites that contain their succulent host plants.
Source: Wikipedia
What it eats
Larvae feed on Dudleya species such as D. cymosa, D. lanceolata and D. saxosa.
Source: Wikipedia
Life cycle
After the larval stage, the chrysalids hibernate under stones. Adults that emerge show strong site fidelity, often returning to the capture location.
Source: Wikipedia
When you see it
Adults exhibit site fidelity after emergence. Removed butterflies tend to return to their original site at higher rates than expected.
Source: Wikipedia
Where it comes from
They are found in North America, specifically California and Baja California. Many populations have been documented throughout those regions.
Source: Wikipedia
Lookalikes
The orange and black wing markings distinguish the Sonoran blue from other blue butterflies in North America.
Source: Wikipedia
Where it is found in the US
Recorded in 3 of 51 states and DC. Most records: California, Kansas, Tennessee.
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 does the Sonoran blue live?
It is native to California and Baja California, inhabiting desert cliffs, rocky washes and outcrops.
Source: Wikipedia
What do the caterpillars eat?
The larvae feed on Dudleya species and bore into the leaves of these succulents.
Source: Wikipedia
How can I tell a Sonoran blue apart from other blue butterflies?
Both sexes have orange and black wing markings, and males are bright iridescent blue while females are darker with less blue.
Source: Wikipedia
Same family (Lycaenidae)
Sources
- Wikipedia: https://en.wikipedia.org/wiki/Philotes_sonorensis
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.