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Pea-Sized Snails Once Thought Extinct Released Back Into the Wild

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A species of tiny snail, once believed extinct for over a century, has been successfully reintroduced into the wild. More than 1,300 Desertas Island land snails are being released on Bugio Island, part of Portugal’s Madeira Archipelago. Each snail has been carefully marked with infrared paint to allow conservationists to monitor their progress.

The journey to save these critically endangered snails began when conservationists discovered small populations surviving on the cliffs of Desertas Grande, a neighboring island. These populations were alarmingly small, with fewer than 200 individuals found in each group. Believed to be the last of their kind, the snails were transported to zoos in the UK and France, including Chester Zoo, to begin an ambitious breeding program.

At Chester Zoo, 60 snails were successfully bred in captivity for the first time. Dr. Gerardo Garcia, head of ectotherms at the zoo, described the immense challenge, saying, “We started with a blank slate, learning how to care for them, create a suitable environment, and encourage them to breed.” Thanks to these efforts, the species has been brought back from the brink of extinction.

The snails had originally been driven to near extinction by invasive species like goats, rats, and mice, which posed significant threats to their survival. Bugio Island was chosen for their release because it offers a safer habitat with fewer invasive predators.

This conservation milestone offers hope for the recovery of a species that had nearly disappeared from the planet. The marked snails will now be closely monitored to ensure their adaptation and survival in the wild.

Axolotls’ Global Fame Contrasts with Their Struggle for Survival in the Wild

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Axolotls, the aquatic salamanders famous for their cute appearance and remarkable regenerative abilities, have become a cultural phenomenon in recent years. With their wide eyes, smiling mouths, and pastel pink coloring, they are frequently seen in media, including video games like Minecraft and merchandise like stuffed animals. However, despite their widespread popularity and the countless axolotls bred for research and the pet trade, these creatures are facing a severe survival crisis in the wild, specifically in their native habitat of Lake Xochimilco in Mexico City.

Scientist Dr. Randal Voss, a professor of neuroscience at the University of Kentucky, is no stranger to the axolotl’s celebrity status. During public outreach events, he often meets people who are fascinated by these salamanders, expressing how much they adore them, either from online content or toys. “They’re so adorable, we love them,” is a common refrain. However, behind their public charm, axolotls face critical threats that have led them to the brink of extinction in their natural environment.

A Scientific Mystery

The name “axolotl” comes from the Nahuatl language, spoken by the Aztecs, and refers to the god Xolotl, who was said to transform into a salamander. Unlike most amphibians that undergo a complete metamorphosis from aquatic larvae to land-dwelling adults, axolotls retain their juvenile features throughout their entire lives. This phenomenon, known as neoteny, is one of the key areas of scientific interest in axolotls. Their gills, which are visible and external, allow them to breathe underwater, and they remain fully aquatic in the unique environment of Lake Xochimilco.

The reasons behind this inability to undergo metamorphosis are still debated. One hypothesis suggests that the lake’s resources were so abundant that axolotls did not need to expend energy transforming into land-dwelling adults. This adaptation allowed them to thrive in the aquatic environment, which is now increasingly threatened.

The Decline of Lake Xochimilco and Its Inhabitants

Lake Xochimilco, a 10-square-mile water body with slightly salty water, has undergone significant changes over the past century. Originally home to an extensive network of chinampas, or floating agricultural islands, the lake provided a rich habitat for axolotls. However, the rise of industrialization, pollution, and invasive species such as carp and tilapia has severely degraded the ecosystem. These fish prey on axolotl eggs, further reducing their numbers. A 1985 earthquake that displaced many people around the lake also contributed to habitat destruction.

As a result, axolotls are now critically endangered, with fewer than 100 adults remaining in the wild. While the wild populations are dwindling, axolotls thrive in scientific laboratories and the exotic pet trade, where they are bred for research and as pets. The axolotls seen in pet shops are often genetically distinct from their wild counterparts, and many are selectively bred for unusual colors like pink, white, and black—traits that are rare in nature.

The Role of Axolotls in Science and the Pet Trade

Axolotls have played a crucial role in scientific research for over 150 years. Their ability to regenerate limbs, spinal cord tissue, and other body parts has made them a valuable subject for studies on tissue regeneration and stem cell biology. In 1864, axolotls were first brought to Europe, and since then, their unique biology has captured the interest of researchers worldwide.

In the pet trade, axolotls are often bred for their striking appearance. However, the animals sold in pet stores tend to have limited genetic diversity due to inbreeding, which poses a risk to their overall health and long-term survival.

The Challenges of Conservation

While axolotls have achieved widespread recognition, this fame has not translated into significant conservation success. The public’s familiarity with the species can sometimes lead to a false sense of security, with people assuming that the salamanders are thriving everywhere. In reality, the axolotls of Lake Xochimilco are critically endangered and require immediate attention.

Dr. Luis Zambrano, a professor of zoology at the National Autonomous University of Mexico, has been working on axolotl conservation for over two decades. He emphasizes the need for innovative strategies to protect the species, particularly through efforts that combine local knowledge with scientific research. One promising approach involves restoring the chinampa system, which could help improve the quality of the lake’s water and provide better habitat for the axolotls.

The Road to Restoration

Efforts to save the axolotl will require policy changes and support from both local communities and global conservation efforts. Zambrano suggests that the rising popularity of axolotls could help raise awareness and fund conservation initiatives. Symbolic adoption programs, where people can support axolotl conservation efforts, may provide a vital source of funding for restoration projects.

Nearly 1,000 Endangered Animals Repatriated from Thailand to Madagascar

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In a significant victory against wildlife trafficking, nearly 1,000 endangered tortoises and lemurs are being returned from Thailand to their native Madagascar. This repatriation, which began Saturday, is the largest operation of its kind between the two nations, Thai officials announced.

The animals, which include critically endangered spider tortoises, radiated tortoises, ring-tailed lemurs, and brown lemurs, were seized in May during an anti-trafficking operation in Chumphon province. The species are listed under the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) as among the world’s most endangered. They are often targeted for the exotic pet trade, despite the difficulties in replicating their natural habitats, which puts their survival at significant risk.

Recovery and Challenges

Thai authorities rescued 1,117 animals during the operation, but eight had already died due to harsh conditions during smuggling. Others succumbed later due to poor health caused by inadequate food, water, and unsuitable living conditions.

Despite these losses, Thai officials, in collaboration with Madagascan authorities, are sending 961 surviving animals back home on three Qatar Airways flights. The first group departed Saturday, following an official handover ceremony in Bangkok.

Dr. Chalermchai Sri-on, Thailand’s Minister of Natural Resources and Environment, emphasized the operation as a testament to Thailand’s commitment to combating illegal wildlife trafficking and ensuring the welfare of rescued animals.

A Global Message Against Trafficking

Attapol Charoenchansa, head of Thailand’s Department of National Parks, Wildlife, and Plant Conservation, highlighted the global significance of the operation. “Broadcasting such efforts worldwide sends a strong message that wildlife trafficking is unacceptable, even for those with the resources to purchase and collect these animals,” he stated.

The UK-based conservation group Traffic praised the operation, calling it “a true testament to the power of international collaboration” in addressing wildlife trafficking.

Madagascar’s Biodiversity Under Threat

Illegal wildlife and timber trades are identified as the second-largest threat to Madagascar’s biodiversity, according to Traffic’s 2023 report. Thailand, the largest importer of Malagasy wildlife in Southeast Asia, plays a key role in this trade, which often involves re-exporting threatened species. From 1975 to 2019, Thailand imported nearly 35,000 animals and animal products from Madagascar, either directly or indirectly.

This repatriation effort marks a critical step in preserving Madagascar’s unique and threatened ecosystems while raising global awareness about the perils of wildlife trafficking.