Group
1 |
Learn
to migrate
by following ultralight airplanes
Group
1 chicks are captive-born. |
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Crane #2-11
(escaped during fall migration: migrated with wild cranes. Suspected dead April 2015.)
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Group
2 (DAR) |
Learn
to migrate by following older cranes in the flock
Group
2 chicks are also captive-born. In fall the chicks are released
in the company of older cranes from whom the young birds learn the
migration route in a program called
Direct Autumn Release (DAR). |
The
International Crane Foundation
(ICF) raised 8 young
cranes for the 2011 Direct Autumn Release (DAR) program. The young
chicks spent six weeks at the Necedah NWR in Juneau County, Wis.,
where they got used to wetland habitat and wild cranes near by. They were transported to Horicon National Wildlife Refuge on September 20. Costumed biologists
from ICF will watch over them. On October 14 these
cranes were banded. On October 21 they were set free in the company of older
cranes on Horicon NWR. They willl
learn the migration route south by following these older cranes.
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Group
3 (W = wild hatched) |
Learn
to migrate by following their parents
Group
3 chicks are wild-born. Their parents raise them and teach them
to migrate. This is the natural way cranes learn to migrate.
One
day, this flock will be large enough for wild-born parents to take
over. Then human-assisted migration will no longer be needed. |
Image: Eva Szyszkoski, ICF
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Four
chicks hatched in the new Eastern flock in spring 2011. None
survived past July 1.
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