One of Alberta’s endangered amphibians is experiencing a resurgence as provincial efforts to revive northern leopard frog populations have proven successful in establishing new self-sustaining communities, according to a report by the Government of Alberta. The northern leopard frog, classified as a threatened species in Alberta since 2004, was once widespread in the province but faced a substantial decline in the 1970s and 1980s, prompting conservation initiatives.
Brett Boukall, a wildlife biologist specializing in at-risk species, highlighted that reintroduction strategies focused on translocating the frogs and releasing eggs in new areas to foster fresh populations. The efforts have led to a broader distribution and an increased number of populations in southern Alberta.
Successful reintroduction projects at various locations, including Battle River, Kinbrook Island Provincial Park, Beauvais Lake Provincial Park, Grainger, and Wyndham-Carseland Provincial Park, have confirmed the presence of self-sustaining northern leopard frog populations. Boukall noted the effectiveness of translocating eggs in establishing new populations within the frog’s former range.
Due to the successful reintroductions and existing populations in Alberta, there is currently no need for further introductions. Over the years, a significant number of tadpoles have been introduced as part of the translocation program, contributing to the growing sustainability and distribution of the northern leopard frogs.
The decline in northern leopard frog populations in the past was attributed to various factors, including pesticides, herbicides, habitat destruction, disease, and changes in habitat due to fish stocking. Cynthia Paszkowski, an ecology professor, emphasized the importance of suitable habitats for establishing self-sustaining frog populations.
In Alberta, efforts to reintroduce northern leopard frogs have benefited from the availability of appropriate habitats within the frog’s historical range. Paszkowski highlighted the essential elements required for successful frog populations, including breeding, overwintering, and terrestrial habitats.
Alberta is home to a variety of frog species, including the boreal chorus, Columbia spotted, northern leopard, and wood frog, as well as the Canadian, Great Plains, plains spadefoot, and western toad.
