This video from the USA is called Oregon Spotted Frog tagging.
From Wildlife Extra:
Oregon spotted frog released into the wild to halt population crash
In an effort to re-establish their populations in Washington State, approximately 500 Oregon spotted frogs were released into the wild after spending the first seven months of their lives in a captive rearing program.
Endangered Oregon spotted frogs returned to native habitat: here.
The Oregon Spotted Frog (Rana pretiosa) had an historic range from south-western British Columbia to northern California.
The Oregon spotted frog has lost 95% of its habitat. Volunteers count egg masses in March at WA’s Conboy Lake Refuge: here.
Zoologists Find New Ways to Help Amphibians: here.
Over half of Europe’s amphibians face extinction by 2050: here.
Malathion pesticide kills amphibians: here.
- Raising Frogs for Freedom (3quarksdaily.com)
- Herbicide Atrazine Exposure Increases Risk of Deadly Fungal Disease for Frogs (scienceworldreport.com)
- No frog meeting in Sunriver (bendbulletin.com)
- Tentative signs of recovery in some Terania Creek frogs (abc.net.au)
- Frog Herbicide Exposure Increases Risk of Dying from Fungal Disease (scienceworldreport.com)
- Squeaking by: Frog species rediscovered in ghana, but invasive devil weed threatens its survival. (blogs.scientificamerican.com)
- Devastating Frog Fungus Triggers Cell Suicides (livescience.com)
- Early-life exposure of frogs to herbicide increases mortality from fungal disease (sciencedaily.com)