Airsurveys of breeding and wintering Steller's sea eagle at Kamchatka: successes, failures and perspectives

By Alexander LADYGUIN
Contents:
Specific of air survey at Kamchatka
Brief historical review: scope of the areas, covered by helicopter surveys
Technique
methods, tools and techniques, strategyes disadvantages)
Results:
 breeding:
- status
- distribution
wintering:
- status
- distribution
Perspective of future monitoring of a populations