The fate of an endangered alpine lizard, the guthega skink, hangs in the balance as climate change threatens its very existence. With a warming planet, these lizards are running out of space to live, and their numbers are dwindling. But there's a glimmer of hope: a captive breeding program has been successful, and a pregnant female named Omeo is set to give birth in March, potentially adding two more skinks to the endangered species.
These lizards, one of Australia's only alpine species, live on 'sky islands' above 1,600 meters in two isolated locations in Victoria and New South Wales. Dr. Zak Atkins, a skink specialist, warns that they are extremely vulnerable due to their specific habitat requirements. As the climate warms, their alpine zone is shrinking, and there's nowhere higher for them to go.
The guthega skinks' survival is further threatened by more frequent and severe bushfires, which have already destroyed multiple colonies. A captive breeding program by Zoos Victoria has been instrumental in saving these lizards. In December, seven skinks joined a specially designed enclosure with granite rocks, plants, and their favorite food, alpine mint bush and snow beard-heath.
The program has been a success, with all the skinks surviving and the imminent arrival of babies marking a significant milestone. Dr. Atkins is thrilled with the results, stating that the lizards are thriving in their new environment.
The skink babies will be a stark contrast to their parents. While adults are camouflaged brown and grow to about a ruler's length, the young ones are tiny, jet black with vibrant yellow spots, and weigh about as much as a button. Dr. Joanna Sumner, from Museums Victoria's research institute, explains that guthega skinks live in close-knit family units, with females typically giving birth to only one or two babies a year.
The captive-bred skinks were released into a semi-wild enclosure, where they began digging their own burrows, a positive sign of their adaptability. Grace Rouget, the carnivores and reptiles coordinator at Healesville Sanctuary, hopes that these lizards will one day support the genetic diversity of neighboring wild populations.
However, the future of these lizards is still uncertain. Associate Prof. Ailie Gallant, a climate scientist, emphasizes the need to rapidly reduce emissions to protect the alpine environments that these lizards call home. With their habitat shrinking and bushfires becoming more frequent, the guthega skinks' survival is a race against time. The success of the captive breeding program offers a glimmer of hope, but it's a reminder that urgent action is needed to safeguard these endangered lizards and their fragile ecosystem.
