Brown Longtail Butterfly: Identification, Life Cycle, and Behavior

In this article, we will explore the intriguing world of the Brown Longtail Butterfly, from its remarkable features to its fascinating lifestyle.

We’ll guide you through its identification process, life cycle, and unique behaviors.

You’ll also learn about its distribution, dietary preferences, and challenges the species faces.

Brown Longtail (Urbanus Procne)

What is the Classification of Brown Longtail Butterfly?

Belonging to the Lepidoptera order, commonly housing butterflies and moths, the Brown Longtail Butterfly sports a unifying taxonomical identity.

Officially classified under the Urbanus Procne species, it resides in the vast Skipper butterfly family or the Hesperiidae.

  • Kingdom: Animalia
  • Phylum: Arthropoda
  • Class: Insecta
  • Order: Lepidoptera
  • Family: Hesperiidae
  • Genus: Urbanus
  • Species: U. Procne

This precise categorization aids scientists in tracking its unique evolution and ecological role. Varying categorizations also help butterfly enthusiasts identify and distinguish the Brown Longtail Butterfly from a crowd of diverse species.

On a broader scale, understanding this classification becomes pivotal, serving as a map, guiding us to navigate this butterfly’s unique lifestyle and its place within the world’s natural order.

What is the Distribution of Brown Longtail Butterfly?

The Brown Longtail Butterfly, a matter of keen interest for enthusiasts, is predominantly found in Central and South America.

Regions that sport a high number of these species range from Central Mexico and extend down to Argentina.

High populations are also witnessed in Trinidad, demonstrating a broad distribution range for this butterfly variety.

If you’re in the United States, don’t lose hope on sighting one. The Brown Longtail Butterfly can make occasional appearances in Southern Texas, specifically in the Lower Rio Grande Valley.

This shows they are not limited to just Central and South America.

Coastal areas or regions with a constellation of marshes mark a rich habitat for these butterflies. The Brown Longtail Butterfly, known scientifically as the Urbanus procne, prefers such ecosystems to call their sanctuary.

According to records, they conquer elevations up to 4,500 feet (1,372 meters), heralding high terrestrial adaptability.

To recapitulate, the distribution of the Brown Longtail Butterfly is expansive, spreading across various geographic features and miles apart.

Their adaptability, echoed by their ability to thrive at impressive elevations and a variety of climates, further widens their range of distribution.

You will find them fluttering blissfully in warmer climates, so consider visiting these areas if you’re a believer in their charismatic flight.

What are the Main Characteristics of the Brown Longtail Butterfly?

The Brown Longtail butterfly, or Urbanus procne, is a beautiful creature loved by many for its unique appearance. Its wings exhibit an earthy brown color, hence the name.

You’ll also notice a pair of elongated tail-like extensions on its hind wings, a signature trait that distinguishes this butterfly from other species.

The Brown Longtail butterfly is relatively small, with its wingspan ranging from 1.4 to 2.2 inches (35 to 55 millimeters).

As it spreads its wings, you can see the striking contrast between the upper-side, which is darker, and the under-side that features a paler hue.

Also, Brown Longtail butterflies exhibit a varied pattern of white spots or streaks on the underside of their wings. Exactly as in the table below:

Wing side Description
Upper-side Dark brown with few markings
Under-side Light brown with white spots or streaks

The adults are also remarkable fliers, known for their swift and direct flights. These traits make the Brown Longtail not just fascinating to observe but also a delightful challenge for butterfly enthusiasts to photograph.

Observing these physical characteristics and flight behaviors will help you easily identify the captivating Brown Longtail butterfly in nature. Stay keen!

How to Identify Male and Female Brown Longtail Butterfly?

Recognizing the male and female Brown Longtail butterfly might seem challenging. However, there are some distinct differences to look out for.

Wing Pattern

The males possess a unique upper wing pattern. They have iridescent blue patches on the upper side of their long tail wings.

These eye-catching patch can be seen when they spread their wings under the sun. On the other hand, females lack this iridescent blue patch on their wings. Their upper wings are entirely yeallow-brown, without any color patches.

Wing Size

Another notable difference is in their wing size. Males usually have longer and slender wings, while the females have broader wings.

In specifics, the male wings usually span around 2.5 inches (63.5 millimeters), while the female butterflies have larger wings that span approximately 3 inches (76 millimeters).

Body Shape

Observing the body shape can also help in differentiating males from females. Males are lean with slender bodies, whereas females are more robust and somewhat larger.

If you are able to get close and observe these butterflies in details, these are the signs that could help distinguish between the genders.

Remember, the wing pattern, wing size, and body shape are the key factors to note.

They may require detailed observation and some patience, but knowing these signs will make it easier for you to identify whether the Brown Longtail you’re looking at is a male or a female.

What is the Mating Ritual of Brown Longtail Butterfly?

Brown Longtail butterflies are intriguing not only for their captivating looks, but for their unique mating rituals.

Males engage in ‘puddling’ behavior, a process where they gather on moist spots on the ground to attract mates. This act showcases a display of strength and fitness to potential partners.

During the courtship phase, the male performs a ‘dance’ around the female. The dance involves fluttering his wings and moving in a rhythmic pattern. He’s attempting to impress her with his visual display.

If the female is receptive to the male’s display, she’ll allow him to mount and begin the process of mating. The mating act typically lasts for several minutes and can occur multiple times a day.

This fascinating complexity of romance in Brown longtails is part of what makes them such appealing subjects in the world of lepidopterology.

What Does the Caterpillar of Brown Longtail Butterfly Look Like?

Witnessing a Brown Longtail Butterfly caterpillar is akin to spotting a rare celestial body.

Embodying a robust frame, the caterpillar is marked by a striking olive-green hue accented by fine silver specks, akin to jewels dropped by a goddess.

  • Length: When it comes to length, expect to find mature caterpillars measuring about 4 centimeters (roughly 1.5 inches).
  • Body: The caterpillar’s body is a tapestry of breathtaking complexity. The body is cylindrical and tapering gently towards the rear. Each segment of its body features four pale yellow bands.

As it feasts on leaves, the caterpillar’s body showcases a notable sheen as if it’s been polished.

Its head isn’t visible as it’s tucked away, giving it a unique look with its rear ‘end’ adorned by two red spots framed by yellow, giving an illusion of a larger creature’s face.

Surveying the caterpillar, you’ll witness a symphony of nature’s best design philosophy. Rest assured, the Brown Longtail Butterfly caterpillar is nothing short of a marvel.

What is the Life Cycle of Brown Longtail Butterfly?

The life cycle of a Brown Longtail Butterfly is an intriguing journey, comprising of four essential stages.

  • First, it all begins with an egg. Female butterflies deposit their eggs on the undersides of specific host plants, providing the first meal for the newborn larvae.
  • After a while, the eggs hatch, giving birth to small, ravenous caterpillars, armed with a robust appetite for the host plants. These caterpillars have a simple directive: eat, grow, and shed their skin. Through a process called molting, they shed their old skin four to five times as they outgrow it.
  • When the caterpillar has grown significantly, it enters the pupal stage, forming a cocoon or chrysalis around itself. This is predominantly a period of transformation. Inside the chrysalis, the caterpillar’s old body undergoes remarkable changes. It morphs into a beautiful butterfly, developing long, brightly colored wings and transitioning into adulthood.
  • At last, the adult butterfly emerges from the chrysalis. It pumps fluids into its wings to extend them, then allows them to dry. Once the wings are ready, the butterfly takes flight, to feed, mate, migrate, and eventually die, leading to the continuity of the lifecycle.

In essence, the lifecycle of a Brown Longtail Butterfly is a fascinating process, signifying the ultimate transformation and continuous renewal of life.

What Is the Average Life Expectancy of a Brown Longtail Butterfly?

The Brown Longtail Butterfly (Urbanus procne) lives an average of 2-3 weeks. It’s important to note that the entire lifespan, from egg to death, lasts for roughly 1-2 months. The lifespan may vary depending on the surrounding conditions.

  • Life as a caterpillar: This stage often lasts between 10 to 15 days. During this period, they feed and grow, preparing to enter the chrysalis stage.
  • Chrysalis stage: The Longtail then enters the transformative stage of a chrysalis. Typically, this phase lasts from 5 to 10 days.
  • Adult butterfly lifespan: Once they emerge as adult butterflies, their life expectancy ranges from 2 to 3 weeks, maxing out around a month in rare cases.

Let’s break down this information in a simple table:

Life Stage Time Span
Caterpillar 10 – 15 days
Chrysalis 5 – 10 days
Adult Butterfly 2 – 3 weeks

Remember, these time spans are averages. External factors such as temperature, diet, and threats can impact the lifespan of a Brown Longtail Butterfly.

What Does the Diet of a Brown Longtail Butterfly Consist Of?

You’ve probably spotted a butterfly fluttering around blooming flowers in the garden. Like other butterfly species, the Brown Longtail Butterfly feeds mostly on nectar from various flowers.

Their sole diet throughout their adult lives is, in fact, flower nectar.

  • Nectar: This is the Brown Longtail Butterfly’s primary diet during its adult stage. They’ve been spotted fluttering around an array of flowers, extracting the sweet nectar with their long coiled proboscis. This high-energy food source provides the carbohydrates necessary for their energy-consuming flight activity.
  • Mineral-rich Mud: To supplement their nectar diet, these butterflies have the art of mud-puddling. In this, they seep up moisture from damp soil or sand to extract necessary nutrients and minerals. It’s essential for their metabolic activities and reproduction.
  • Tree Sap, Decaying Fruit, Dung: Sometimes Brown Longtails have the opportunity, they might snack on tree sap, overly ripe fruits or animal dung. Foul to us, but it’s a crucial nutrient source to them.

In a nutshell, the diet of a Brown Longtail Butterfly consists of floral nectar as a primary energy source. Then, they gadget mud-puddling as a means of acquiring essential minerals.

Thus, providing them with the required fuel to fly, mate, and reproduce. Noting resources in our surroundings plays a significant role in attracting and preserving these vibrant partners of our environment.

Therefore, making deliberate efforts to sustain flower diversity and maintain naturally damp patches in your garden would make an inviting habitat for these charming bugs.

Which Plants Serve as the Primary Hosts for Brown Longtail Butterfly?

The Brown Longtail Butterfly, specifically know as Urbanus procne, shows a preference for certain species of plants.

These butterflies closely associate with Fabaceae family plants, or legumes, and use these as their primary hosts.

  • Key species include various beans and pea variants.
  • They have been known to favor pigeon peas, Cajanus cajan, and cowpeas, Vigna unguiculata.

These butterflies lay their eggs on these plants. Then, after hatching, the caterpillars feed on them, making Fabaceae plants essential for their reproduction and survival.

Even though they can adapt to other plants, the Brown Longtails exhibit optimal development when fabaceous plants are in plenty.

Why the preference? Factors include the chemical composition of these plants and the minimal risk of predation.

These plants provide an enriched source of nutrition for both adult butterflies and their larvae. The leaf structure of these plants acts as a shield, protecting the eggs and caterpillars from predators.

Your lovely garden can certainly play host! Incorporating legume family plants such as beans or peas in your garden may attract the otherwise elusive Brown Longtail Butterfly.

Such a move not only promotes butterfly health but also encourages biodiversity in your garden or landscape.

Take note, changes in the distribution and abundance of these host plants due to factors like climate change and human activities have major effects on butterfly populations.

The protection of these host plants is essential in maintaining the population of these beautiful creatures.

What are the Unique Mimicry Behaviors in Brown Longtail Butterfly?

A fascinating aspect of the Brown Longtail Butterfly is its uncanny knack for mimicry. This is not just a sporadic quirk but a recurring behavior observed in these wonderful creatures.

They employ mimicry as a basic survival tool, primarily for shielding themselves from predators.

Contrary to what you might presume, the Brown Longtail Butterfly does not mimic only other butterflies. In fact, they are known to imitate certain types of wasps as well.

By emulating the visual aesthetics of a wasp, they trick potential predators into thinking they are a threat.

These butterflies implement workable tactics, including the movement patterns and flight styles usually associated with wasps.

Take note, to the untrained observer, this butterfly-wasp mimicry can be shockingly convincing. In executing their deception, they rely on intricate visual clues and extensive behavior changes.

Remember, the Brown Longtail Butterfly’s mimicry goes beyond surface level imitations. Their survival depends on how well they perform this deceptive ensemble.

Hence, they perfect the act, even imitating the aggressive behavior of wasps to sell the deceit. In a way, the life of a Brown Longtail Butterfly stands testimony to the well-known saying – ‘Survival of the fittest.’

Notably, the Brown Longtail Butterfly doesn’t stop at mimicry. This butterfly species also uses ‘diversionary markings’. These are strategically positioned patterns on their wings to misdirect the attention of predators.

The predator sees the marking as a false target, allowing the butterfly to escape in the opposite direction. Quite impressive survival strategy, isn’t it?

What Are the Main Threats to Brown Longtail Butterfly Populations?

The beautiful Brown Longtail Butterfly faces a spectrum of threats that endanger their survival. These threats mainly originate from human activities and changes in their natural ecosystems.

  • Habitat Loss Primarily, the destruction of their natural habitats is a pressing issue. Housing and agricultural developments often come at the cost of forests and meadows, the prime habitats of the Brown Longtail.
  • Climate Change Climate change poses another imminent danger as shifts in temperature and precipitation patterns alter ecosystems. These changes can disrupt the lifecycle of the Brown Longtail, especially the caterpillar phase, which is sensitive to environmental changes.
  • Pollution The excessive use of pesticides in the areas around the butterfly habitats is also a concern. Pesticides can have lethal effects on the caterpillars and limit the growth of plants that the butterflies use for nourishment and reproduction.
  • Invasive Species Finally, invasive plant and animal species also contribute to the decline of the Brown Longtail populations. These alien species compete with the butterflies for food and habitat, often edging them out.

To counter these threats, sustainable and eco-friendly practices need to be prioritized. Progress is being made, but much more needs to be done to safeguard the future of these butterflies.

Remember, conservation starts at home, and your conscious decisions can play a significant role in protecting these beautiful creatures.


In conclusion, the Brown Longtail Butterfly is an intricate species with unique behaviors, fascinating life cycle, and significant role in the ecosystem.

Understanding their distinct qualities helps in furthering efforts for their conservation.

We would love to hear your thoughts, why not leave a comment below on what you find most interesting about the Brown Longtail Butterfly?

Butterflies   Updated: September 15, 2023
avatar Welcome to Insectic, a blog to learn about insects and bugs. I'm Richard, and I've created this website to share my experience, knowledge, and passion with others.

Leave a Comment

Your email address will not be published. Required fields are marked *