After a second molt, the Quino checkerspot is recognized by the dark black coloration and row of 8 to 9 orange tubercles on their back.

), as well as purple owl’s clover (Castilleja exserta) and thread-leaved bird's beak (Cordylanthus rigidus), as secondary host plants.

Much of the historic scrub land that it occupied, much like the Mission blue butterfly, also endangered, has been built over.

Invasive species, in the form of non-native plant life and overgrazing are just two of the hurdles facing the recovery of the Quino checkerspot.

[6] Habitat declined and, thus, distribution and population of the Quino checkerspot has been greatly reduced during the last 100 years, likely around 75%.

The other impactors to the decline include non-native grasses and fire suppression practices as well as grazing.

The Quino checkerspot became the second subspecies of Euphydryas editha to be listed under the Endangered Species Act (ESA).

The construction of additional border walls in new locations would likely have adverse effects on many species, including the Quino checkerspot.

In addition, the proposed wall could harm the native vegetation the butterflies need and may spread invasive species in areas disturbed by the construction.