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Kentucky State Butterfly

Viceroy ButterflyKentucky State Butterfly - Viceroy Butterfly

(Basilarchia archippus)

Adopted on July 13, 1990.

The Viceroy Butterfly, (Basilarchia archippus,) was chosen as Kentucky State Butterfly on July 13, 1990 partly because of its striking resemblance to a large and better known species the Monarch Butterfly. The difference between the two is that the Monarch Butterfly is poisonous and the Viceroy Butterfly is not. The birds still will not eat the Viceroy Butterfly because it looks so much like the Monarch Butterfly.

Kentucky State Butterfly: Viceroy Butterfly

Kentucky State Butterfly - Viceroy ButterflyThe Viceroy caterpillars can trick its predators. It can do this because it looks like bird droppings. The Viceroy Butterfly eats willows, poplars, and aspen leaves.

Closely resembling the toxic monarch and queen butterflies, the viceroy was once thought to be nothing more than a clever palatable mimic. The viceroy, monarch and queen are all mahogany brown or orange with black wing veins and white spots, but the viceroy is the only one with a black band across the middle of the hind wings; the monarch has bold black veins on all four wings; and the queen lacks black veins on the front wings, and its white spots are much more obvious. Recent scientific research, however, has shown that the viceroy does in fact sequester toxic chemicals from its larval host plants that make it very bad-tasting to a variety of predators. A classic example of "Mullerian mimicry", all three noxious species (the viceroy, monarch and queen) gain protection by displaying a similar overall color pattern. Any predator attempting to eat any one member of the species trio is likely to get a bad stomach ache or at least a bad taste in its mouth. When a similar looking butterfly is subsequently encountered, the predator will probably avoid the meal, not wanting to make the same unpleasant culinary mistake again.

Widespread throughout much of the U. S. and Canada, the viceroy is a common garden visitor. Although capable of strong and rapid flight when disturbed, the viceroy often lingers at flowers, rotting fruit, dung and sap, making it a highly visible and approachable butterfly. Especially prevalent along streams, ponds and marshes, the viceroy typically does not stray far from its willow and aspen larval host plants.

Characteristics of the Viceroy Butterfly

The viceroy butterfly is dark orange with black veins. A row of white spots edge its wings. Its color and pattern mimics the monarch butterfly's pattern except for a black horizontal stripe that crosses the bottom of its back wings. The viceroy caterpillar is white and olive-brown.


The viceroy can be found in most of the continental United States and in southern Canada and northern Mexico.


The viceroy butterfly lives in meadows, marshes and swamps and other wet areas with willow, aspen and poplar trees.


The viceroy caterpillar eats the leaves of willow and poplar trees.

Life Cycle

The viceroy mates in the afternoon. The female lays her eggs on the tips of the leaves of poplars and willows. There are usually two or three generations of viceroys born each breeding season.


The viceroy and monarch were once thought to exhibit Batesian mimicry where a harmless species mimics a toxic species. Studies conducted in the early 1990's suggest that the viceroy and the monarch are actually examples of Mullerian mimicry where two equally toxic species mimic each other to the benefit of each. Just goes to show you there's always something new to discover in the natural world!

Kentucky Law


2.083 State butterfly.
The viceroy butterfly is named and designated as the state butterfly.
Effective:July 13, 1990
History: Created 1990 Ky. Acts ch. 78, sec. 1, effective July 13, 1990.

Taxonomic Hierarchy:  Viceroy Butterfly

KingdomAnimalia -- animals
Phylum Arthropoda
Class Insecta
Order Lepidoptera
Family Nymphalidae
Genus Basilarchia
Species Basilarchia archippus
State Insects,
Butterflies, and Bugs
State Insects,
State insects are selected by 45 states of the 50 United States. Some states have more than one designated insect, or have multiple categories (e.g., state insect and state butterfly, etc.). More than half of the insects chosen are not native to North America, because of the inclusion of three European species (European honey bee, European mantis, and 7-spotted ladybug).
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