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This
photo of the whooping crane captive propagation center at the USGS
Patuxent Wildlife Research Center was taken in the early 80's. There are
more crane pens now, but not much else has changed. The Center's natural
landscape provides a good environment for the whoopers who call it home.
(USFWS photo) |
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This
pair of whooping cranes, Laz and Alta, were both hatched and raised at
Patuxent. Laz, the female in the background, came from an egg produced
here, while Alta, the male in the foreground, was brought, as an egg, from
the wild flock from Wood Buffalo National Park in Canada. They've been
parents many times. (USGS photo) |
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Watching
whooping cranes dance is a special thrill. As they jump into the air and
flap their wings, the freedom and joy in their movements feels contagious.
They dance for the same reasons we dance: to court a mate, to celebrate
the spring, or sometimes just because it's fun. (USFWS photo) |
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Most
of the whooping cranes from Patuxent originated from eggs collected from
the wild flock. This aerial photo shows a whooper in Wood Buffalo National
Park, Canada, defending its nest from the helicopter hovering over it.
Whoopers lay two eggs, but usually only one chick survives. By collecting
the second egg, researchers were able to establish the breeding flock at
Patuxent while still allowing the wild pair to raise a chick. This helped
preserve the valuable genetics of the wild flock without affecting their
population. While researchers collected eggs for Patuxent, the number of
birds in the wild flock continued to increase. (USFWS photo) |
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This
is a wild whooping crane nest with two eggs in it. The nest sits in water
to help protect it from predators, and is built of mud, reeds, and other
vegetation so that it's dry. The blotchy coloring of the eggs helps
camouflage them in the nest. (USGS photo) |
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Whooping
crane eggs do better when they have natural incubation during their early
development. Here a pair of whooping cranes incubates an egg in a pen at
Patuxent. Both birds share incubation, both in the wild and in captivity.
In this picture, the female incubates the eggs, while the male stands
ready to take over when he is needed. (USFWS photo) |
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Because
the whoopers at Patuxent lay more than two eggs a year, we need more
cranes to incubate some of the extra eggs. This sandhill crane at Patuxent helps by incubating
a whooping crane egg during its critical period. Sandhill cranes at
Patuxent are also used to help ensure the
safety of procedures that may eventually be used on whooping cranes. They
are called "surrogates", or act as substitutes for whoopers. (USFWS
photo) |
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Whooper
eggs can safely be incubated mechanically in the later stages. Eggs in
incubators like this one can be watched more easily. Most of these eggs
are raised by technicians. Eggs that are scheduled to be raised by
whooping crane pairs (parent-reared) are left under whoopers to hatch. (Photo
by Carlyn Williamson, USGS Patuxent Wildlife Research Center) |
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This
tray of whooper eggs has just come out of the incubator. The eggs will be
examined, candled, and weighed to see how their development is
progressing. Eggs lose weight during incubation as the chicks grow and use
up yolk and fluid. But if an egg loses too much weight too quickly, it can
be helped by special treatments or placed in a separate incubator that has
a higher humidity level. (Photo by Nelson Beyer, USGS Patuxent Wildlife
Research Center) |
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From
the moment that a whooper chick can see outside of its egg, it will be
handled only by a person wearing a crane costume to prevent the chick from
imprinting on humans. Carlyn is wearing a poncho-like body costume and a
hood which covers her face. The camouflage netting on the hood allows her
to see, but disguises her face from the chick. The puppet head she's
holding will be the "parent" to the chick. Once we're in these
costumes, we have trouble telling each other apart! (Photo by Carlyn
Williamson, USGS Patuxent Wildlife Research Center) |
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Wearing
a crane costume, Kathy checks on the progress of hatching whooper eggs.
These eggs have been removed from the mechanical incubator and are in the
hatcher. The temperature and the humidity of the hatcher are slightly
different from the incubator, to give the chick more moisture during
hatching, and to prevent the chick from hatching too quickly. (USGS
Patuxent Wildlife Research Center photo) |
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Jane
examines this just-hatched whooper chick. He is still wet, fresh out of
the egg. She will make sure his umbilicus is closed, that his yolk sac is
completely absorbed, and she will spray his umbilicus with an iodine spray
to prevent bacterial contamination. She'll weigh him, put a leg band on
him to identify him, then put him back in the hatcher to dry off. All he
wants to do is sleep after all the hard work of hatching. (Photo by
David H. Ellis, USGS Patuxent Wildlife Research Center) |
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This
5 day old whooper has a coat of fluffy cinnamon-colored down, bright blue
eyes, and a good appetite. He can already catch crickets (though sometimes
they get away!), and he's learned to eat crumbles from a bowl. His
"mother" and "father" are a stuffed model and a puppet
head in his pen, but he has a live whooper adult as a neighbor next door.
Watching that adult will help him learn how to be a whooper himself.
Everything the chick is exposed to--the stuffed model, the puppet, and the
live adult--helps in proper imprinting. (Photo by Damien Ossi, USGS
Patuxent Wildlife Research Center) |
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Dan has taken these 8 day
old whoopers out for a walk. (A second chick can be seen in larger photo.)
They've been following him in the grass, good exercise for growing legs
and feet. After the walk, he rewards the chicks by offering them mealworms
in a bowl. Mealworms are crane "candy," good for a treat, but
not a balanced diet. Dan doesn't talk to the chicks, but purrs to them
like their parents would, and uses the puppet head to show them the
mealworms and encourage them to eat.
(Photo by Damien Ossi, USGS Patuxent Wildlife Research Center) |
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Brenda
shows a two week old whooper the wonders of the natural world when she
brings him to a small pond. Using the puppet, she'll show him how to probe
in the wet ground as he discovers how much fun a puddle can be. Frogs,
earthworms, and flying insects are all there to tempt the young whooper
and help him learn to hunt and forage. (Photo by Barbara Niccolai,
USGS Patuxent Wildlife Research Center) |
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A
four-day-old whooper chick gets sleepy at night. The red glow is from the
overhead heat lamp that provides heat near the stuffed model of a brooding
whooper so that the chick will associate warmth with an adult crane. The
brooding model is made from the body of a swan and the plastic modeled
head of crane. The stuffed model's beak sits in the rim of a water jug so
that the chick will peck at the beak and learn to drink. The chick cuddles
near the security and warmth of the model and in a few seconds will lay
down and sleep soundly, warm and safe. (Photo by Damien Ossi,
USGS Patuxent Wildlife Research Center) |
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This
whooper chick is around 25 days old. It's amazing how rapidly they grow
from that small 6-day-old chick shown earlier. Regular exercise and a
good diet have ensured this chick's rapid growth and good health. (Photo
by Barbara Niccolai, USGS Patuxent Wildlife Research Center) |
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In
another 20 days the change is even more dramatic. This chick is around 45
days old. He's beginning to grow real feathers, including primary
feathers, but the chick down is still there at the tips of the new
feathers making him very fluffy. He'll preen the down away as his new
feathers grow until he's sleek all over. (Photo by Barbara
Niccolai, USGS Patuxent Wildlife Research Center) |
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At
65 days of age, the chick is almost fully grown. He's starting to fly, and
all his down is gone. His feathers are a combination of cinnamon and
white, except for the black wing tips he already has. The color
combination helps to camouflage him in the wild. His eyes have changed
from blue to gold, though there is still a hint of green in them. As he
gets older, the cinnamon feathers will shed, one-by-one, and be replaced
with white ones until, after a year, he'll be completely white. (Photo
by Kathleen O'Malley, USGS Patuxent Wildlife Research Center) |
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After
a year, the chick will be completely white with black wing-tips like this
wild whooper. His eyes are gold, and the red crown on the top of his head
is covered with spare black feathers. The whooping crane is North
America's tallest bird, and is an international symbol of conservation. (USGS
photo) |