title: Reply to Akçay & Beecher: yes, team of rivals in chipping sparrows.
authors.affiliation: Graduate Program in Organismic and Evolutionary Biology, University of Massachusetts Amherst, Amherst, MA, USA.
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Goodwin
authors.affiliation: Graduate Program in Organismic and Evolutionary Biology, University of Massachusetts Amherst, Amherst, MA, USA Department of Biology, University of Massachusetts Amherst, Amherst, MA, USA jpodos@bio.umass.edu.
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Podos
mesh_terms: D000818:Animals; D003299:Cooperative Behavior; D008297:Male; D046370:Sparrows / Q000502:physiology*; D013731:Territoriality; D014828:Vocalization, Animal