abstract:Heteren is a village in the Dutch province of Gelderland. It is located in the municipality of Overbetuwe, about 12 km southwest of Arnhem on the south bank of the Rhine.
Christa Mateman, at the Netherlands Institute of Ecology, in Heteren, and Jan Komdeur, at the University of Groningen, and their colleagues, have discovered that young female Seychelles warblers sometimes help at their parents' nest for a year or two after they hatch.