Red Admiral Butterfly
Taxonomic Hierarchy Photo
Kingdom: Animalia -- animal
Phylum: Arthropoda -- arthropods
      Subphylum: Hexapoda -- hexapods
Class: hexapoda -- insects

      Subclass:

Pterygota -- iwinged insects
           Infraclass: Neoptera -- modern, wing-folding insects
Order: Lepidoptera -- butterflies, moths
Superfamily: Papilionoidea -- butterflies
      Family: Nymphalidae -- admirals, anglewings, brush-footed butterflies
           Subfamily: Nymphalinae
Genus: Vanessa -- Ladies and Red Admirals
Species: Vanessa atalanta
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United States Range Map

 

California Range Map

Adult Sexes Similar

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Identification:   Life history:
Upperside is black with white spots near the apex; forewing with red median band, hindwing with red marginal band. The winter form is smaller and duller, summer form larger and brighter with an interrupted forewing band.   The Red Admiral has a very erratic, rapid flight. Males perch, on ridgetops if available, in the afternoon to wait for females, who lay eggs singly on the tops of host plant leaves. Young caterpillars eat and live within a shelter of folded leaves; older caterpillars make a nest of leaves tied together with silk. Adults hibernate.
Flight:   Wing Span:
Two broods from March-October in the north, winters from October-March in South Texas.   1 3/4 - 3 inches (4.5 - 7.6 cm).

Caterpillar Hosts:

  Adult Food:
Plants of the nettle family (Urticaceae) including stinging nettle (Urtica dioica), tall wild nettle (U. gracilis), wood nettle (Laportea canadensis), false nettle (Boehmeria cylindrica), pellitory (Parietoria pennsylvanica), mamaki (Pipturus albidus), and possibly hops (Humulus).   Red Admirals prefer sap flows on trees, fermenting fruit, and bird droppings; visiting flowers only when these are not available. Then they will nectar at common milkweed, red clover, aster, and alfalfa, among others.
Habitat:   Season:
Moist woods, yards, parks, marshes, seeps, moist fields. During migrations, the Red Admiral is found in almost any habitat from tundra to subtropics.    
Remarks:   Conservation:
Caterpillar makes a larval shelter, either tying up the leaves of a shoot tip, or usually later in the life cycle rolling a leaf.   Conservation: Not required.

NatureServe Global Status: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.

Management needs: None reported.

Sources used to Construct this Page:  
            
 

Additional Photos

Adult Sexes Similar

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All photos 2008 Rick Swartzentrover - Free for non-profit use.

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Global ranks indicate the rarity of a species at a global scale. Species may be fairly common globally but imperiled locally. Global ranks have the following meaning:

  • G1 - Critically Imperiled - At very high risk of extinction due to extreme rarity (often 5 or fewer populations), very steep declines, or other factors.
  • G2 - Imperiled - At high risk of extinction due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors.
  • G3 - Vulnerable - At moderate risk of extinction due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors.
  • G4 - Apparently Secure - Uncommon but not rare; some cause for long-term concern due to declines or other factors.
  • G5 - Secure - Common; widespread and abundant.
  • * ? or Q = status unknown or uncertain