Colorado Hairstreak (Hypaurotis crysalus)
The Colorado Hairstreak is a stunning purple butterfly that thrives in the oak scrublands of the western United States, predominantly between mid-June and August. Belonging to the genus Hypaurotis, it is the only species within this genus, making it a unique and fascinating subject for butterfly enthusiasts and researchers alike.
Scientific Classification
- Family: Lycaenidae
- Genus: Hypaurotis
- Scientific Name: Hypaurotis crysalus
Overview
The Colorado Hairstreak is most commonly found in Utah, Colorado, Arizona, New Mexico, and other states within the Colorado Plateau. This butterfly’s preferred habitat is the oak scrublands, where it relies heavily on the gambel oak (Quercus gambelii) as a host plant for its larvae. Adults of this species are known for their striking dark purple coloration and their preference for tree sap and honeydew over nectar from flowers.
Description and Identification
Caterpillar
The mature larva of the Colorado Hairstreak is a vibrant green, featuring a segmented body that tapers towards both ends. Fine hair-like structures cover the body, providing it with a soft, velvety texture that can be quite distinct upon close observation.
Pupa
The pupa or chrysalis of the Colorado Hairstreak is light brown, adorned with dark, irregular spots. Additionally, a streak of purple can often be seen running along both sides of its body, adding to its unique appearance during this developmental stage.
Adult Butterfly
Sexual Dimorphism: Sexual dimorphism is present in the Colorado Hairstreak, with males and females displaying subtle differences in size and coloration.
Color and Appearance: When the wings are open, the upperside exhibits a dark purple to violet coloration with a wide dark to black border. Both wings bear orange spots around the lower outer corner. When the wings are closed, the underside is pale to dark gray with dark and white markings, along with an orange patch near the margin of each forewing and an orange spot bearing a black center near the tail. Each hindwing also features a thin hairlike tail.
Average Wingspan: The Colorado Hairstreak has an average wingspan ranging from 2.5 to 3.3 inches, making it a medium-sized butterfly.
Flight Pattern: The flight pattern of the Colorado Hairstreak is typically average, characterized by short, quick flights interspersed with periods of rest.
Behavior: Colorado Hairstreak butterflies are often seen basking in the sunlight with their wings open, displaying their vibrant colors. They are more active during the warmer parts of the day and tend to rest in shaded areas during the hottest times.
Reproduction: Females lay their eggs one at a time on the leaves of host plants. The eggs are white and are typically laid in late summer, allowing the larvae to hatch and develop in the optimal conditions of early autumn.
Eggs
The eggs of the Colorado Hairstreak are small and white, laid singly on the leaves of the host plant. This solitary egg-laying behavior helps to ensure the larvae have ample food supply upon hatching.
Quick Facts |
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| Distribution | Mostly found in Utah, Colorado, Arizona, New Mexico, and the Colorado Plateau states. |
| Habitat | Typically found in the oak scrublands. |
| Lifespan of Adults | Around 2 weeks. |
| Host Plants | Prefers gambel oak (Quercus gambelii). |
| Adult Diet | Adults prefer tree sap and honeydew secreted by other insects rather than nectar from flowers. |
How to Identify Colorado Hairstreak?
Identifying the Colorado Hairstreak involves looking for specific physical and behavioral traits. The butterfly is easily recognizable by its dark purple to violet wings with wide black borders and orange spots near the lower corners. When the wings are closed, the underside displays a contrasting pattern of pale to dark gray with distinct dark and white markings. The presence of thin, hairlike tails on the hindwings is another distinguishing feature. Observing their habitat can also aid in identification; these butterflies are typically found in oak scrublands, often near gambel oaks.
Did You Know?
- The Colorado Hairstreak was designated the state insect of Colorado in 1996, a testament to its unique beauty and regional significance.
- Unlike many other butterflies, the Colorado Hairstreak prefers tree sap and honeydew as its primary food sources, rather than flower nectar.
- These butterflies have a relatively short adult lifespan, living for only about two weeks.
Conclusion
The Colorado Hairstreak is a remarkable butterfly, not only for its striking appearance but also for its unique ecological preferences and behaviors. Its reliance on gambel oak for its life cycle and its unusual dietary habits make it a fascinating subject for study and conservation.
Frequently Asked Questions
What does a Colorado Hairstreak butterfly look like?
Where can you find the Colorado Hairstreak butterfly?
What do Colorado Hairstreak caterpillars eat?
How can you tell the difference between male and female Colorado Hairstreaks?
Why are Colorado Hairstreaks found near gambel oak trees?
When is the best time to see a Colorado Hairstreak butterfly?
What color is the chrysalis of a Colorado Hairstreak?
Scientific Classification
- Family: Lycaenidae
- Genus: Hypaurotis
- Scientific Name: Hypaurotis crysalus
Dr. James Watuwa on July 10, 2019.
Butterfly Team
