first cranes could leave as early as the beginning of
April. The migration is usually complete by mid to late
May, two to six weeks later.
cranes depart in small family groups.
Biologist Tom Stehn flies
over the refuge 1-2 times a month. You'll find
his crane counts in our Migration Updates.
Reports come from confirmed visual sightings along
migration route. Ranger Jeanine Lackey of the U.S.
Fish and Wildlife Service office in Nebraska facilitates
the reporting network.
on nesting grounds:
As the cranes travel through Canada and complete their
migration to the nesting grounds, Lea
Craig-Moore, wildlife technician with the Canadian
Wildlife Service, sends the news.
older cranes leave first, and they could leave as early
as the middle of March. The migration is usually complete
by mid to late April.
traditional classroom mapping, the eastern flock is the
focus. The flock's youngest
cranes are monitored the most closely but tracking
information is recorded on all cranes insofar as possible.
the year's youngest cranes during their first winter.
The cranes are tracked by a combination of visual
sightings and signals from radio and satellite telemetry.
Trackers make every effort to track them from the moment
they leave the wintering grounds until all have been
accounted for on the nesting grounds. Their
reports and technology give us a source of data points
on nesting grounds:People
eagerly await the cranes' arrival in Wisconsin. We expect
frequent news as the cranes complete migration. Students
can maintain an
Arrival Log for
all of the cranes in this flock.