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The global race to safeguard irreplaceable ecosystems is nearing a critical threshold, and the window to protect vital areas for climate stability, biodiversity, and human wellbeing is rapidly closing. Growing pressure from extractive industries, including oil, gas, and mining, is putting irreplaceable ecosystems and Indigenous Territories at risk, especially across the pantropical belt. Protected and conserved areas are well-documented to be important safe havens for nature amidst an ever-expanding industrial footprint in terrestrial ecosystems.

Initiatives to protect 30% of Earth by 2030 prompt evaluation of how to efficiently target shortcomings in the global protected area (PA) network. Focusing on amphibians, the most vulnerable vertebrate class, we illustrate the conservation value of microreserves, a term we employ here to refer to reserves of <10 km2. We report that the network continues to under-represent threatened amphibians and that, despite this clear shortcoming in land-based conservation, the creation of PAs protecting amphibians slowed after 2010.

This publication has been developed as a contribution to Phase II of the Two-phase Strategy on Protected Areas of the Secretariat of the Convention on Biological Diversity (CBD) and prepared pursuant to various paragraphs of COP decision XIII/2 on protected areas, in particular paragraph 5(a-e), and paragraph 10 of decision XI/24.