What factor primarily dictates the nomadic movements of the Cedar Waxwing?

Answer

Availability of soft, fleshy fruits

The nomadic lifestyle of the Cedar Waxwing is dictated almost entirely by the availability of soft, fleshy fruits, which constitute the cornerstone of their diet, causing their location to be dynamic across seasons as they track ripe berry patches.

What factor primarily dictates the nomadic movements of the Cedar Waxwing?
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