The reintroduction technique, called "hacking," includes collecting chicks from
the wild at five to six weeks old and placing them in "hack boxes" until they
are ready to fly. DNR staff will feed the birds released from the hack sites
while they learn to fly and catch fish on their own. Male ospreys generally
return to nest at the site at which they learned to fly. Females will follow
males to their nesting grounds. Ospreys usually do not nest until they are three
years old. They will migrate to South America in the fall and may not be seen
again at hacking sites until they are ready to
nest.
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