Speciation is a continuum

New genomic analysis of Borneo's fanged frogs shows extensive gene flow between previously proposed 'cryptic species,' producing clusters of cohesion rather than dozens of cleanly separated species. That means species delimitation should weigh both divergence and ongoing interbreeding, not just one or the other. — How we define species affects species counts and conservation priorities, so better methods that account for gene flow can change where limited conservation resources go.