| The
successful restoration of the peregrine falcon across much of North America
has been an unparalleled success. Although still extremely rare, the peregrine
is no longer endangered. Indeed, in many areas this falcon is more numerous
today than at any time in the past.
There are
many reasons for the success. To a large extent, it is attributable to
the bird's remarkable versatility and adaptability. The peregrine falcon
has proven to be one of those few species that thrives in manmade environments.
It is also very tolerant of human activities and disturbances.
The key to
successful restoration, however, was inspired and determined human intervention.
Scientists first needed to learn how to breed peregrines in captivity.
Young, captive raised birds were then released back into the wild. This
too was a learning process. One of the initial surprises was that the
reintroduced birds tended to do better in cities than in areas where peregrines
had traditionally been found.
In the Midwest,
reintroduction efforts began in 1982. It was a collaborative effort, involving
numerous public agencies and private groups. The project has been coordinated
and monitored by scientists from The Raptor Center at the University of
Minnesota.
An early
milestone was reached in 1987, when a pair of reintroduced birds nested
on the Multifoods Tower in Minneapolis and successfully fledged one offspring,
a female named Maud. Maud thus became the first peregrine falcon to be
produced in the wild as a result of the Midwest restoration efforts.
Augmented
by continued releases of captive raised peregrines, the Midwest population
has grown steadily since the restoration project started. A second milestone
was reached in 1993, when for the first time the number of wild produced
young exceeded the number of captive raised birds released.
By 1999,
the population had recovered sufficiently to permit the “de-listing”
of the peregrine for purposes of the Federal Endangered Species Act. In
recent years the population appears to be stabilizing, presumably because
the best territories are now occupied and there is limited room for growth.
In 2002, a total of 144 territorial pairs were recorded in the thirteen
states and two Canadian provinces that are deemed to be included in the
Midwest study area. A considerable majority (89%) nested, and most of
the nests (83%) fledged at least one young.
To date,
1,159 young falcons have been released into the wild as part of the Midwest
Peregrine Falcon Restoration Project. In addition, a total of 2,029 young
peregrines are know to have been produced in the wild since 1987. Although
a small number of releases continue, they are no longer necessary. Barring
the development of new threats, the peregrine falcon appears to be firmly
reestablished and natural production should be more than sufficient to
maintain the population at or above its current levels. Moreover, those
levels have already exceeded the most optimistic of the initial goals
and projections. To put things in perspective, it is estimated that the
breeding population present in the Midwest today is approximately three
times larger than the comparable population that existed under natural
conditions.
- Information
provided by Wick Corwin
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