# Fluctuating optimum and temporally variable selection on breeding date in birds and mammals

> Research article (Proceedings of the National Academy of Sciences, 2020) · cited 143× · AI/ML

**Wikidata**: [openalex:W3107101620](https://www.wikidata.org/wiki/openalex:W3107101620)  
**Source**: https://4ort.xyz/entity/fluctuating-optimum-and-temporally-variable-selection-on-breeding-date-in-birds-and-mammals