How does the movement pattern of Rough-legged Buzzards during migration typically differ from many other migratory birds?

Answer

Their movement is often spread out over time rather than being in dense flocks

Unlike some migratory birds that move in dense flocks, the movement of Rough-legged Buzzards is often spread out over time across broad latitudes.

How does the movement pattern of Rough-legged Buzzards during migration typically differ from many other migratory birds?
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