Character displacement within the breeding area questions reinforcement in Ficedula flycatchers
V. G. Grinkov, I. V. Palko, H. Sternberg
The paper examines character displacement in Pied Flycatchers, finding that environmental temperature, not geographic proximity, drives phenotypic variation in breeding plumage color.
bioRxiv · Jan 23, 2019 · PreprintEvolutionary Biology