Recent findings have unveiled the presence of the world's smallest possum, previously thought to be limited to specific regions, in South Australia. This exciting discovery may broaden the known habitat of this vulnerable species.
Pygmy possums, tiny marsupials akin to mice, inhabit open woodlands and heathlands, feeding on nectar, pollen, and insects. They are vital as pollinators within their ecosystems. The Yorke Peninsula, traditionally inhabited by the Narungga people, has long been recognized as a habitat for the western pygmy possum (Cercartetus concinnus). However, a recent study published in the journal Australian Zoologist indicates that the elusive little pygmy possum (Cercartetus lepidus) might also reside there.
Researchers revisited wildlife survey data collected between 2004 and 2011 in Dhilba Guuranda-Innes National Park, a crucial remnant of native vegetation at the peninsula's tip. Among over 250 pygmy possum observations, two specimens photographed in 2006 captured attention due to their smaller size and distinctive gray belly fur. Initially classified as juvenile western pygmy possums, these observations were re-evaluated as there were no prior records of other pygmy possum species in the vicinity; the nearest known population of little pygmy possums is on Kangaroo Island, which has been isolated from Yorke Peninsula for the last 10,000 years.
After analyzing the photographs against specimens from the South Australian Museum, researchers confirmed that these were indeed little pygmy possums. "Discovering a new population is significant, especially since about 19 out of 24 ground-dwelling mammals have gone extinct on the Yorke Peninsula," stated Sophie Petit, the study's lead author from Adelaide University.
Pat Hodgens, a fauna ecologist with the Australian Wildlife Conservancy, endorsed the findings, suggesting that additional studies, including recaptures and DNA analysis, could further validate the identification of this species. Confirmation of this new population would be a positive development for the species, which faces challenges from habitat fragmentation and the impacts of bushfires.
The authors emphasize the importance of cautious land management practices until the status of the little pygmy possum population is fully understood. "It's possible that this population has become locally extinct in the last 20 years, given its rarity," Petit remarked. "However, it would be wonderful to discover that it has survived."