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In an exciting discovery, a new species of tarantula with electric blue coloration was found in Thailand.
“In 2022, the bamboo culm tarantula was discovered, marking the first known instance of a tarantula species living inside bamboo stalks. Thanks to this discovery, we were inspired to rejoin the team for a fantastic expedition, during which we encountered a captivating new species of electric blue tarantula” researcher Dr. Narin Chomphuphuang said.
Following the announcement of Taksinus bambus in Thailand, he and his research team, along with JoCho Sippawat, a local wildlife YouTuber, embarked on a survey expedition in the Phang-Nga province. During their survey, they not only identified this new tarantula species by its distinctive electric-blue coloration but also discovered its unique natural history. This is the first tarantula species ever found in a Thai mangrove forest.
“The first specimen we found was on a tree in the mangrove forest. Collecting them was challenging due to the muddy and waterlogged ground. These tarantulas inhabit hollow trees, and the difficulty of catching an electric-blue tarantula lies in the need to climb a tree and lure it out of a complex of hollows amid humid and slippery conditions. During our expedition, we walked in the evening and at night during low tide, managing to collect only two of them,” Narin said.
“The first specimen we found was on a tree in the mangrove forest. Collecting them was challenging due to the muddy and waterlogged ground. These tarantulas inhabit hollow trees, and the difficulty of catching an electric-blue tarantula lies in the need to climb a tree and lure it out of a complex of hollows amid humid and slippery conditions. During our expedition, we walked in the evening and at night during low tide, managing to collect only two of them,” Narin said.
“Allow us to introduce our exciting discovery: a new species of tarantula that exhibits a mesmerizing blue-violet hue, reminiscent of electric blue sparks. The secret behind the vivid blue coloration of our tarantula lies not in the presence of blue pigments, but rather in the unique structure of their hair, which incorporates nanostructures that manipulate light to create this striking blue appearance,” Narin said.
Blue is one of the rarest colors to appear in nature, which makes blue coloration in animals particularly fascinating. The scarcity of the color blue in nature can be attributed to the challenges associated with absorbing and reflecting specific wavelengths of light. Blue is difficult to produce in nature because, to appear blue, an object needs to absorb very small amounts of energy while reflecting high-energy blue light. This is challenging, because blue light has shorter wavelengths and higher energy compared to other colors. Generating molecules capable of absorbing this energy is complex, making blue in nature relatively rare.
In essence, what we perceive as a blue tarantula is, in fact, a result of how light interacts with the nanostructure-covered hairs on the tarantula’s body, causing some colors to cancel each other out and allowing only blue to be reflected. These biological photonic nanostructures create a remarkable iridescent effect that changes as you alter your viewing angle, making the tarantula even more captivating.
What’s even more fascinating is its ability to not only display blue but also a beautiful violet hue. Violet light occupies only a small portion of the visible light spectrum, and there are very few nanostructures precise enough to exclusively scatter violet light. Moreover, violet wavelengths are even more energetic than blue.
In terms of coloration, female and juvenile male C. natanicharum exhibit unique characteristics attributed to the presence of two distinct types of hair. Notably, they possess a more pronounced metallic-blue coloration on various parts of their bodies, while violet hues are predominantly observed in specific areas such as the chelicera, carapace, and certain leg segments. In adult male C. natanicharum, a similar coloration pattern is retained on the chelicera, carapace, and legs, although it appears less intense compared to females. Furthermore, there is a notable shift in coloration on their legs and body, transitioning to white due to the increased density of white setae.
“This species was previously found on the commercial tarantula market. There, it was known as the “Chilobrachys sp. Electric Blue Tarantula” but no documentation existed describing its distinctive features or natural habitat. The exact location where the Electric Blue Tarantula lived remained a mystery until our recent discovery. This has led us to speculate that C. natanicharum may be present in the southern region of Thailand, especially in the remaining forest areas close to where it was found,” Narin said.
According to a study just published in the journal ZooKeys, C. natanicharum exhibits adaptability in inhabiting evergreen and mangrove forests, where tarantulas live inside tree hollows. They can be found at elevations ranging from sea level to highland areas, and live in both arboreal and terrestrial burrows within evergreen forests, at elevations of up to 57 m.
“Unlike our previous discovery, the bamboo culm tarantula, which is specifically associated with bamboo, the electric blue tarantula demonstrates remarkable adaptability. These tarantulas can thrive in arboreal as well as terrestrial burrows in evergreen forests. However, when it comes to mangrove forests, their habitat is restricted to residing inside tree hollows due to the influence of tides, and they cannot be found living terrestrially within mangroves.” Narin said.
The scientific name of Chilobrachys natanicharum was chosen after an auction campaign for naming the new species. The winner of the auction campaign was Nichada Properties Co., Ltd., Thailand, which suggested a combination of the names of Mr. Natakorn Changrew and Ms. Nichada Changrew, who are company executives.
All proceeds from the auction were donated to support the education of Lahu children in Thailand and poor cancer patients.
“The Lahu people are an indigenous hill tribe in northern Thailand (Musoe) and are known for their vibrant culture and traditional way of life. Unfortunately, many Lahu children are denied access to education due to poverty, leaving them with limited opportunities for their future. The goal is to help change this by providing educational opportunities for Lahu children, giving them a chance to break out of the cycle of poverty. Additionally, cancer remains a significant public health issue globally, affecting millions of people each year. Many cancer patients struggle with financial hardship, which can make accessing quality care even more difficult. We believe that everyone deserves access to quality healthcare, regardless of their financial situation,” the researchers write in their paper.
“We often encounter the question, ‘What are the benefits of studying new species of tarantulas?’ It’s essential for the general public to understand the significance of taxonomy as a fundamental aspect of research. Taxonomy serves a vital role, ranging from the basic, such as when people inquire on social media about the name of a spider, to conducting crucial research aimed at preserving these species from extinction.” Narin said.
Mangrove forests are invaluable ecosystems offering numerous benefits. However, they face the looming threat of deforestation, which is a destructive process caused by activities such as logging, commercial development, pollution, overfishing, and the impacts of climate change. The electric blue tarantula, the first tarantula species discovered in the mangrove forests of Thailand, is also one of the world’s rarest tarantulas. “When we examine the causes behind the decline of mangrove forests, it becomes apparent that many of these threats are human-induced, both directly and indirectly. This raises a critical question: Are we unintentionally contributing to the destruction of their natural habitats, pushing these unique creatures out of their homes? Or should we advocate for the protection of mangrove forests, not only for the sake of the Electric-Blue Tarantula but also for the preservation of this remarkable jewel of the forest?,” the researchers ask.
Research article:
Chomphuphuang N, Sippawat Z, Sriranan P, Piyatrakulchai P, Songsangchote C (2023) A new electric-blue tarantula species of the genus Chilobrachys Karsh, 1892 from Thailand (Araneae, Mygalomorphae, Theraphosidae). ZooKeys 1180: 105-128. https://doi.org/10.3897/zookeys.1180.106278