In our study area near Lingen (52.27 N, 7.15 E), NW Germany polygyny a
mong the Pied Flycatcher came to light through participation of males
in feeding at 2 or 3 nestboxes (bigyny or trigyny). In the present pap
er we report a first time proof of paternity via DNA fingerprinting wi
th the offspring of a trigynist. It could be evidenced that one male w
as the genetic father of all nestlings in all three broods.