Page 91 - Das Wunder der Migration bei Tieren
P. 91
How do birds find the ir way with no com pass?
Sci en tists ha ve be en con duc ting
ex pe ri ments trying to sol ve this mystery for
over 50 ye ars. In 1960, ro bins we re put in spe -
ci al ca ges in which the di rec ti on of the mag ne -
tic north had be en chan ged. Wit ho ut
he si ta ti on, the birds mo ved to wards the new
mag ne tic fi eld, as tho ugh they had a com pass
and knew which way was north. From this, it
was conc lu ded that un li ke pe op le who ne ed a
com pass, birds can easily find their way when
mig rating.
89
