Insect · GBIF taxon 5714313
California Sister
Adelpha californicaAlso known as California Sister Butterfly
California sisters glide effortlessly through oak woodlands and canyon bottoms, alternating a few rapid wingbeats with long periods of soaring high in the canopy. Their caterpillars feed on oak leaves, accumulating chemical defenses that render the adult butterflies distasteful to birds. Adults frequently descend to wet mud or rotting fruit to sip moisture and essential minerals.
WoodlandMimicryButterflies
1 / 7—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Oak Tree Sap
- Rotting Fruit
- Flower Nectar
Predators
- Birds
- Spiders
- Praying Mantises
ThreatsHabitat loss, intense wildfires, and loss of oak host trees due to Sudden Oak Death.
HabitatsOak woodlands, mixed evergreen forests, mountain canyons, and chaparral margins.
Life span1 to 2 months as adults; up to 1 year total including winter caterpillar diapause.
Size / weightNot available
Classification
- FamilyNymphalidae
- SpeciesAdelpha californica
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Safe to observe at a normal distance.
Responsible observation
- Puddling Spots: Look for males gathering on damp soil or riverbanks during warm afternoon hours.
- Oak Canopy: Watch high in oak branches where adults actively defend aerial territories.
- Gentle Approach: Approach mud-puddling individuals slowly from behind to avoid casting a shadow.
Mimic (c) Don Loarie, some rights reserved (CC BY), uploaded by Don Loarie · cc-by
Host Plant (c) Franco Folini, some rights reserved (CC BY-SA) · cc-by-sa
Host Plant (c) josh jackson, some rights reserved (CC BY) · cc-by
Close Relative (c) John Rosford, some rights reserved (CC BY) · cc-by
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