Fifty automated recording units scattered across the backcountry of Yellowstone National Park in the U.S. gather roughly 500,000 hours of ambient sound each year. Computer models then sift through those recordings for wolf vocalizations, reports Justin Catanoso for Mongabay. Jeffrey Reed, a linguist and former software engineer, helped launch the Cry Wolf Project in 2023 within the long-running Yellowstone Wolf Project. It uses machine learning to pick out and analyze wolf calls. It turns the audio into spectrograms that reveal the structure of individual calls. So far, the project has isolated more than 8,000 continuous hours of wolf recordings, creating what researchers say is the largest database of wild wolf communication. Tracking wolves has generally meant catching them and fitting them with radio collars. Dan Stahler, Yellowstone’s chief wildlife biologist, told Catanoso that doing so is expensive and carries risks for both wolves and people. Recorders can simply be left in the field. Researchers are testing whether differences in wolves’ voices can identify individuals and help track their movements. The idea is also being tested in Europe. In northern Italy’s Po Valley, Osservatorio Lupi — “Wolf Observatory” — has deployed a dozen recording units near farms and towns. It hopes eventually to use the recordings to warn communities when wolves approach livestock. Researchers are exploring similar uses for brown bears and along wildlife migration corridors. Reed has annotated roughly a fifth of the archive by hand to check the models’ results. For now, listening to wolves still involves a fair…This article was originally published on Mongabay

  Last year the Christmas Island shrew, slender-billed curlew, and three Australian bandicoots were among the species formally declared extinct. None has been seen in at least 30 years, but bureaucracy takes a while. They may be joined in the next decade or so by the vaquita and the Sumatran rhino. A child born today may grow up knowing them through archival footage of the last few animals or AI-generated simulations. But biodiversity loss isn’t only about species extinction. The death of a single elder elephant can have consequences for the entire herd. Her knowledge of water sources, for example, can be critical in a drought. And the disappearance of that herd can have knock-on effects on a forest. Seeds lose their dispersal mechanisms, and clearings maintained by elephants may fill in. The result is a less resilient ecosystem even if the change isn’t immediately apparent. Forest elephants in Dzanga Bai, Central African Republic. Image by Rhett A. Butler/Mongabay. Delegates gathering in Yerevan, Armenia, for the U.N.’s COP17 biodiversity talks will assess countries’ progress toward goals to slow these kinds of losses. Under the Kunming-Montreal biodiversity framework, adopted in 2022, governments pledged to conserve 30% of land and seas by 2030 and restore degraded ecosystems. Only four years remain before that deadline. The previous agreement doesn’t inspire much hope: not a single one of the 20 Aichi biodiversity targets had been fully achieved globally by 2020. Implementation of these agreements is also entirely at the mercy of whoever holds office.…This article was originally published on Mongabay