Birds That Don't Exist: Niche Pre‐Emption as a Constraint on Morphological Evolution in the Passeroidea - Chia - 2026 - Ecology Letters - Wiley Online Library onlinelibrary.wiley.com/doi/full/10....
We use topological data analysis to reveal a persistent morphological gap in a major group of songbirds (superfamily Passeroidea). The gap remained unoccupied for millions of years, even though nearb...
