Friday, February 09, 2007

Sandhill Crane Migration

Even though the North Platte area is still shivering under an unusual deep freeze, the first calls of the annual Sandhill Crane migration can be heard overhead. Each year, from mid-February through mid-April, a half a million Sandhill Cranes stop over in the Platte River valley to feed and rest on their way to their nesting grounds in the North.

Information from the Nebraska Game and Parks Commission: An individual crane spends about 29 days along the Platte. During that time, it will deposit up to a pound of fat, which provides the energy necessary to complete the migration and initiate nesting. About 90 percent of their diet consists of corn while the remaining 10 percent is made up of invertebrates such as earthworms, snails, and insect larvae. It has been estimated that the cranes consume nearly 1,600 tons of corn during their stay.

At dusk, the cranes gather along the broad, shallow reaches of the Platte to roost for the night. They prefer to stand in water about six inches deep, taking on the configuration of submerged sandbars.

At dawn, the cranes leave the river and head into the fields to feed. They usually range within five miles of the river. The cornfields provide cranes with a source of energy, while meadows and alfalfa fields provide essential proteins and minerals. They also serve an important social function as loafing and courtship areas.

The "dance" of the Sandhill Crane is well known. Pairs engage in elaborate bowing displays with outstretched wings and leap high into the air. Often, a corncob or stick is picked up and thrown upward repeatedly.

At midday when the sun is shining, look for soaring "kettles" of cranes over the river valley. These groups appear as wisps of smoke from a distance. The birds are testing the thermals and keeping their flight muscles toned for the journey that lies ahead.

Thousands of these birds can be seen within a short drive from North Platte. The North Platte Convention and Visitors Bureau can provide a circle tour driving map that will allow you to get up-close and personal with these majestic birds. There is a viewing blind available at Buffalo Bill State Historical Park. Visit the CVB website at www.visitnorthplatte.com or call (308) 532-4729 for more information.

1 Comments:

At 12:17 PM, Anonymous said...

Quite Informational!

 

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