title: Site-occupancy distribution modeling to correct population-trend estimates derived from opportunistic observations.
authors.affiliation: Swiss Ornithological Institute, 6204 Sempach, Switzerland. marc.kery@vogelwarte.ch
authors.forename: Marc
authors.initials: M
authors.lastname: Kéry
authors.forename: J Andrew
authors.initials: JA
authors.lastname: Royle
authors.forename: Hans
authors.initials: H
authors.lastname: Schmid
authors.forename: Michael
authors.initials: M
authors.lastname: Schaub
authors.forename: Bernard
authors.initials: B
authors.lastname: Volet
authors.forename: Guido
authors.initials: G
authors.lastname: Häfliger
authors.forename: Niklaus
authors.initials: N
authors.lastname: Zbinden