Habitat use studies provide invaluable information for the conservation of species that suffer from habitat loss or degradation. We used satellite telemetry to study the habitat use of white-tailed eagles (Haliaeetus albicilla) in relation to six habitat classes (artificial surfaces, agricultural areas, forests, semi-natural areas, wetlands and waterbodies) and five forest age classes (0–9, 10–19, 20–59, 60–99 and ≥ 100 years old) during the post-fledging period in Finland. The post-fledging period, defined here as the period between fledging and dispersal from the natal area, is a critical life-history stage. Our primary objective was to provide information that could be integrated into landscape planning, including wind-energy development (which poses a threat to white-tailed eagles). We found that the habitat classes that were selected by the young white-tailed eagles were forests, semi-natural areas (i.e., transitional woodland and bare rock) and wetlands. When using forests, the eagles selected stands of 0–9 years old, presumably due to the use of retention trees surrounded by a clear-cut as perching sites. Conversely, the habitat classes that were avoided were artificial surfaces, agricultural areas and (the immediate vicinity of) waterbodies. We conclude that the conversion of natural habitats into built and agricultural areas is detrimental to young white-tailed eagles because it reduces habitat availability. They, however, appear to be capable of using forests recently impacted by forestry if perch trees are present. Careful landscape planning is needed to protect priority habitats and avoid conflicts with an expanding white-tailed eagle population (e.g., by building wind farms in areas already environmentally disturbed).

栖息地使用研究为保护遭受栖息地丧失或退化的物种提供了宝贵的信息。我们使用卫星遥测技术研究了白尾鹰（Haliaeetus albicilla）的栖息地）相关的六个栖息地类别（人造地表，农业地区，森林，半自然地区，湿地和水体）和五个森林年龄类别（0–9、10–19、20–59、60–99和≥100年）老）在芬兰的新秀时期。出雏后时期，这里是指从出生地开始出雏和扩散之间的时期，是至关重要的生活史阶段。我们的主要目标是提供可以整合到景观规划中的信息，包括风能开发（对白尾鹰构成威胁）。我们发现，幼小白尾鹰选择的栖息地类别是森林，半自然区域（即，过渡林地和裸露的岩石）和湿地。在使用森林时，老鹰选择了0–9岁的林分，这大概是由于使用了被清晰包围的保留树木作为栖息地。相反，避免使用的栖息地类别是人造表面，农业区域和水体（紧邻水体）。我们得出的结论是，自然栖息地向人工和农业地区的转化不利于幼小的白尾鹰，因为它降低了栖息地的可利用性。但是，如果有栖息的树木，它们似乎能够使用最近受到林业影响的森林。需要进行仔细的景观规划，以保护优先的栖息地，并避免与不断增长的白尾鹰种群冲突（例如，在已经受到环境影响的地区建立风电场）。