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Fun Facts
Did You Know?
Red-spotted purple's relationship to the white admiral, Limenitis arthemis arthemis, represents one of the more striking examples of within-species geographic variation in North American butterflies. Both forms belong to the same species. The white admiral of the northern United States and Canada carries a broad white median band across both wing surfaces that makes it look like an entirely different butterfly from the red-spotted purple
If This Animal Could Talk...
"Watch closely, respect my space, and let my habitat explain the rest of the story."
The red-spotted purple presents itself as a large, dark, iridescent blue butterfly and lets birds draw their own conclusions. Most birds in North Louisiana's 26 parishes have spent some time around pipevine swallowtails, which taste terrible and advertise it with blue-black iridescence. The red-spotted purple, Limenitis arthemis astyanax, carries no chemical defense whatsoever.
It relies entirely on the pipevine swallowtail's reputation and the birds' learned avoidance of that pattern to get through its day without being eaten. Whether this counts as mimicry in the strict sense or a very effective coincidence of coloration, it works well enough that the red-spotted purple thrives in every North Louisiana woodland where both species occur.
A Few More Facts
How they hunt and forage: Tree sap, fermented fruit, carrion, dung, aphid honeydew, and wet soil draw adult red-spotted purples more reliably than flowers, the same non-nectar preference pattern shared by the question mark, eastern comma, and red admiral. At oak sap flows, fallen figs and persimmons, and damp mineral-rich soil at stream crossings, red-spotted purples feed with the focused, prolonged attention of adults who found something worth staying for. When adults do visit flowers, they prefer small, open-faced species: native asters, goldenrod, and white-flowered plants show up in records more often than the pink and red flowers that gulf fritillaries and monarchs prefer. Adults at flowers in woodland clearings move faster and stay shorter than adults at sap or fruit, nectaring at flowers reads more like a quick stop on the way somewhere else than like the settled, minutes-long feeding at a fallen fig.
Live birth or eggs? no
When young are born: First adults emerge in April and May.
What Is the Red-Spotted Purple Often Confused With?
Adults span three to three and a half inches. The upperside shows blue-black with iridescent blue-green scaling across the hindwing that shifts from near-black to brilliant teal depending on the viewing angle and light quality. The forewing carries a few pale spots along the outer margin. Hindwing underside provides the best identification view: a row of orange-red spots along the inner margin, a curved row of blue spots along the outer margin, and a reddish-orange spot near the wing base. Those hindwing underside spots give the species both its common name and a reliable field mark visible at close range on a perched individual.
Drag the handle left and right to compare Red-Spotted Purple side by side with the species it gets mistaken for most.
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Accessibility
Accessibility
At sap flows on oak trunks in woodland settings, the red-spotted purple's wing adjustments during feeding produce audible rustling at close range in still conditions. The iridescent blue-green hindwing upperside produces a distinctive flash detectable in peripheral vision as the butterfly moves between perch sites in woodland clearings.
At territorial perch sites in sunny forest clearings throughout the 26 parishes, male investigation flights bring adults within a foot or two of a still observer, providing a close-range encounter that needs only standing still in or near an active territory.
Wild cherry at woodland edges throughout the upland parishes and oaks along bottomland forest margins put host plant habitat in reach from road shoulders and trail margins at sites throughout all 26 parishes. Any maintained trail through bottomland hardwood forest or along an upland forest edge with mature wild cherry puts this species in range from April through October.
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Frequently Asked Questions
Does Red-Spotted Purple live in North Louisiana?
Yes. Most birds in North Louisiana's 26 parishes have spent some time around pipevine swallowtails, which taste terrible and advertise it with blue-black iridescence. Whether this counts as mimicry in the strict sense or a very effective coincidence of coloration, it works well enough that the red-spotted purple thrives in every North Louisiana woodland where both species occur. In North Louisiana's 26 parishes, the red-spotted purple form predominates, and adults matching the full iridescent blue-black pattern appear throughout the region from April through October.
How do you identify Red-Spotted Purple?
Adults span three to three and a half inches. The upperside shows blue-black with iridescent blue-green scaling across the hindwing that shifts from near-black to brilliant teal depending on the viewing angle and light quality. The forewing carries a few pale spots along the outer margin
What does Red-Spotted Purple eat?
What the Red-Spotted Purple Eats
Tree sap, fermented fruit, carrion, dung, aphid honeydew, and wet soil draw adult red-spotted purples more reliably than flowers, the same non-nectar preference pattern shared by the question mark, eastern comma, and red admiral. At oak sap flows, fallen figs and persimmons, and damp mineral-rich soil at stream crossings, red-spotted purples feed with the focused, prolonged attention of adults who found something worth staying for.
When adults do visit flowers, they prefer small, open-faced species: native asters, goldenrod, and white-flowered plants show up in records more often than the pink and red flowers that gulf fritillaries and monarchs prefer. Adults at flowers in woodland clearings move faster and stay shorter than adults at sap or fruit, nectaring at flowers reads more like a quick stop on the way somewhere else than like the settled, minutes-long feeding at a fallen fig.
Caterpillars eat the foliage of host plants, working their characteristic tip-to-base feeding pattern that leaves the identifying stub behind. Late instars feed more actively and consume larger portions of leaf surface than early instars, which take small bites and retreat to the midrib between bites in a feeding rhythm that makes them hard to spot during the inactive intervals.
Is Red-Spotted Purple dangerous to people?
No. This species is not dangerous to people when it is observed without handling or disturbance
