Broad front train
The broad front migration is a term from ornithology . It means that the birds - in contrast to the narrow front migration - fly over a migration area over a wide area without a special migration route in the selected migration direction. Whether geographical barriers such as mountains, seas or deserts are bypassed or flown over directly differs from species to species. If the obstacles are flown around, broad-front pullers also briefly end up in so-called draft funnels.
This move strategy applies to most species. Only migratory birds that are tied to certain resting places on their way or require certain thermal conditions (such as storks , many water birds, cranes ) move on migratory roads in a narrow front.
literature
- Peter Berthold : Bird migration. A current overview. Scientific Book Society Darmstadt. 4th ed. 2000. pp. 80, 89 and 101. ISBN 3-534-13656-X .