Operation Osprey: Flight and Farewell


© B. J. Barton
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This is the third and final article about Operation Osprey. If you haven't already read "What a Bird!" and "Ospreys in the Tower," you might want to take a look at them for more about ospreys.

We had been observing the five young ospreys in the hacking tower between July 14 and July 25 when the hinged front of the nest box was opened, providing a "porch" where they could freely exercise their wings and eventually fledge. Once they had their freedom, the maturity and behavior of each bird was different. We watched them anxiously. If they tried to fly and landed in the water too far from land they could tire their young wings paddling to shore and drown. A sudden gust of wind when they were flapping and jumping as much as a foot into the air could send them off the tower, ready or not. Wind and storms excited them, sending them into an ecstasy of wing flapping. If they flew a short distance, got too tired, and landed on the ground, they could meet up with an unfriendly dog or get far enough to land on the busy road a little way from the ponds. Some of us stayed around to watch, even when we weren't scheduled.

Red and White (named by their leg bands) both moved out onto the porch. We had noticed that Red was poorly coordinated. This was one of the extra birds we received that had fallen from its nest in Idaho. Red flew on that first day of freedom, but landed in the water and paddled to shore. It was put back into the nest box by attendants, but three days later, fell off the tower and was taken to a veterinarian. Red was subsequently shuttled to another veterinarian and then to the Colorado State University Veterinary Teaching Hospital where it died on August 12. A necropsy determined that it died from a blood clot at the base of the brain, possibly from the original fall from the nest. This was the only bird of 10 received that we lost.

That period while the birds were fledging, we were busy tracking them, using the telemetry equipment when they were out of sight. If two volunteers were at the site, one would follow the radio signal until we could see the bird and determine it's safety. We recorded their locations about every half hour. If we couldn't get a radio signal for a bird for an hour, we used the radio to call the DOW employees to help

Osprey Portrait
Osprey on Tower
     

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