In 2013, Arizona’s rare leopard frogs were under threat from invasive bullfrogs, but by 2019 conservationists had expanded their recovery network from 7 sites to 19

• PC: AI GeneratedThe Arizona project began with a problem that was easy to see but difficult to solve.
• American bullfrogs had established themselves in the Cienega Creek watershed, where they could prey on Chiricahua leopard frogs and carry the fungal disease chytridiomycosis.
• The response involved more than removing the invasive frogs.