News spotlight: Study buoys hope for rare axolotls
1 May 2025<div><p>Axolotls — the cute and charismatic creatures made famous by the video game “Minecraft” — are in a free fall.</p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">Pollution, modern farming and the introduction of invasive fish that prey on the critically endangered species have reduced their habitat to the channels of a single lake in Mexico.</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">But a new study is offering a glimmer of hope: Captive-bred axolotls can survive in the wild, Justine McDaniel reported for <a href="https://www.washingtonpost.com/climate-solutions/2025/04/30/axolotls-endangered-amphibian-mexico-city/" target="_blank">The Washington Post</a>.</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">“This is a huge step, because in conservation programs when you have animals in captivity and you take them back to the wild … there’s a lot of mortality,” Alejandra Ramos, the study’s lead author and a science faculty member at the Autonomous University of Baja California in Mexico, told the Post.</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">Axolotls have long been bred in labs — and are a popular aquarium pet — but boosting their numbers in the wild has proven to be a much greater challenge.</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"><a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0314257&utm_source=pr&utm_medium=email&utm_campaign=plos006" target="_blank">The study</a> tagged 18 axolotls with radio transmitters that would allow them to be tracked, then released eight into Mexico City’s Lake Xochimilco and 10 into a man-made wetland. At least twice a day for 40 days, researchers visited the sites to collect data.</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">Notably, the researchers found that the axolotls introduced to a man-made pond also survived — a promising finding for the potential of artificial wetlands to aid axolotl conservation, the study authors said.</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">That finding matters in the event that their habitat doesn’t recover or climate change worsens, Esther Quintero, a Conservation International-Mexico biologist, told The Washington Post.</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">“It’s kind of like having a Plan B,” she said. “One can at least be sure that we have two different places in which we can restart the population.”</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">Conservation International is supporting a project in Lake Xochimilco to restore the axolotl’s natural habitat by returning to ancestral farming practices. By supporting farmers’ transition to pesticide-free farming and helping install biofilters to clean the water, the project aims to restore these waters so axolotls can thrive into the future.</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">“Saving the axolotl goes beyond liking this creature that is really adorable,” Quintero told the Post. “There is no future for any species without its habitat.”</span></p><p><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;"></span><span style="background-color:initial;font-family:inherit;font-size:inherit;text-align:inherit;text-transform:inherit;word-spacing:normal;caret-color:auto;white-space:inherit;">Read the full story from The Washington Post <a href="https://www.washingtonpost.com/climate-solutions/2025/04/30/axolotls-endangered-amphibian-mexico-city/" target="_blank">here</a>.</span></p><p><em>Mary Kate McCoy is a staff writer at Conservation International. 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