# Unhatched eggs represent the invisible fraction in two wild bird populations

> Research article (Biology Letters, 2020) · cited 33× · AI/ML

**Wikidata**: [openalex:W2999220451](https://www.wikidata.org/wiki/openalex:W2999220451)  
**Source**: https://4ort.xyz/entity/unhatched-eggs-represent-the-invisible-fraction-in-two-wild-bird-populations