Perdeck A.C. (1964) An experiment on the ending of autumn migration in Starlings. ARDEA 52 (3-4): 133-139

Displacement experiments with migrant starlings to Spain and Switzerland indicate that external factors cannot induce a juvenile starling to end its autumn migration, unless it has already migrated for a certain length of time after which a favourable area inhibits further migration. Unfavourable surroundings, however, induce a prolongation of its journey.