Dear
Journey North,
I
feel very fortunate to have been studying for 25 years the whooping
cranes that winter at Aransas on the Texas coast. It is like I’m
a school teacher and the cranes are my students. My class size
has grown more than 3 times larger — from 71 whooping cranes
when I first started in 1982 to the current flock size of 237.
Meet
"Al and Diane," the Lamar Pair
Although every whooping crane is special because it is so rare,
some of my “students” stand out more in my memory
than others. For example, let me write about cranes that I affectionately
call “Al and Diane.” They're named after a wonderful
couple that owns the property where this crane pair first set
up their
winter territory in 1993. The territory is located in the salt
marsh on the Lamar Peninsula across the bay from the Aransas
National Wildlife Refuge, so the official name of this pair is
the “Lamar” pair.
Twenty
Years With Al and Diane
“Al and Diane” were
hatched in 1986. They are now 20 years old. They were captured
as chicks in Canada just before they learned to fly. Plastic
and
metal bands were attached to their legs to serve as ID
tags. Biologists got close to the cranes by helicopter. Then they
ran
after the flightless
chicks until they were able to catch them — usually when
the chicks tried to hide in tall vegetation. By 1994, the colored
plastic
marking bands had fallen off, but each
adult
bird
still has an aluminum band just above what looks like the knee
(but is really
the crane's ankle).
A Productive Pair
The pair of cranes
first
nested
together when they were 7 years old. The pair did not bring
a chick to Aransas the first two times they nested, which is typical
for
inexperienced whooping crane parents. But after those first
two
tries, they have brought 10 chicks to Aransas in 12 years,
making them one of the most productive whooping crane pairs in
the Aransas-Wood
Buffalo Population of whooping cranes.
Photo Sharon Fisher
The Lamar Pair's Productivity |
Year |
Chick(s)
in WBNP* |
Chick(s)
at ANWR** |
1993
|
0 |
0 |
1994 |
0
|
0
|
1995 |
1
|
1
|
1996 |
0
|
0
|
1997 |
2
|
2
|
1998 |
1
|
1
|
1999 |
2
|
1
|
2000 |
1
|
0
|
2001 |
2
|
1
|
2002 |
0
|
0
|
2003 |
1
|
1
|
2004 |
1
|
1
|
2005 |
1
|
0
|
2006 |
2
|
2
|
* WBNP
= Wood Buffalo National Park in Canada.
** ANWR = Aransas National Wildlife Refuge.
Best
Parents
The cranes “Al and Diane” are certainly
some of our best parents in the flock, having raised a large
number
of
chicks. In
14 nesting attempts between 1993 and 2006, this pair has brought
young to Aransas 8 times. For many years, Canadian
biologists
would take the second egg
from the nest and hatch it in captivity. In 1997, the very first year
when both eggs were left in the nests, this pair brought 2 chicks
to Aransas. In 2006,
they once again brought 2 chicks.
The
Other Al and Diane
The human owners of the property quickly adopted
the crane pair. They fed wildlife year around using a metal game
feeder
that
has a timer and throws out corn a few times a day. The whooping
cranes quickly learned to eat the corn at the feeder. Although
feeding wildlife is generally a bad idea since it can provide
wildlife the wrong type of food and make the animals too tame,
whooping cranes often eat corn as they migrate between Canada
and the U.S. I wonder if the extra calories that the crane pair
gets from the feeder has helped them lay large, healthy eggs
and hatch out strong chicks, particularly in years when natural
foods were somewhat scarce.
A
Generous Gift to the Cranes
The humans Al and Diane have over 700 acres of land where the
cranes live. Al and Diane sold their marsh to the Texas
Nature Conservancy,
which later was donated to the Aransas National Wildlife Refuge.
The higher portions of the property are covered with huge oak
trees that provide habitat for all kinds of native Texas
wildlife. Al
and Diane sold a conservation easement on this upland portion
of their property, promising that forever and ever, this
land will
remain as wildlife habitat and not be developed. The agreement
does allow 2 houses to be built on the property, but no more.
The one house currently on the property is operated as
a Bed and Breakfast that is rented out to crane lovers. You can sit on the screen
porch and watch the whooping crane family come in to feed
at the game
feeder.
A
Treat
What
a special treat it is this year to see the two chicks that the
adult whooping crane raised this winter. This winter,
7 crane pairs each brought two chicks to Aransas, the most
2-chick families that Aransas has ever had. Both the cranes “Al
and Diane” and the people “Al and Diane” are
special. Al and Diane truly care about wildlife and by
protecting their
property it will remain a haven for wildlife forever. This is
quite a gift to give to everyone that loves wildlife. I
am grateful to
have met two people who obviously care about the welfare of wildlife
and wild lands, and who are willing to go out of their way to
ensure that these natural resource treasures are protected
and conserved
for future generations.
Tom Stehn
USFWS
I want to thank conservation biologist Dr. John Cannon
who helped write the material in this report and is a great friend
for the whooping cranes. |