title: Climate change: a hybrid zone moves north.
abstract: A shifting zone of hybridization between two chickadee species helps us understand the proximate mechanisms driving species responses to climate change.
authors.affiliation: Max-Planck Institute of Evolutionary Biology, 24304 Plön, Germany.
authors.forename: Bettina
authors.initials: B
authors.lastname: Harr
authors.affiliation: Department of Ecology and Evolution, University of Chicago, Chicago, IL 60637, USA. Electronic address: pricet@uchicago.edu.
authors.forename: Trevor
authors.initials: T
authors.lastname: Price
mesh_terms: D000818:Animals; D057231:Climate Change; D005260:Female; D008297:Male; D020308:Songbirds