Here's one of Cornell's cool Cedar Waxwing facts:
Cedar Waxwings with orange instead of yellow tail tips began appearing in the northeastern United States and southeastern Canada beginning in the 1960s. The orange color is the result of a red pigment picked up from the berries of an introduced species of honeysuckle. If a waxwing eats the berries while it is growing a tail feather, the tip of the feather will be orange.Of course, now that I know this, I'll have to go looking for an orange-tailed one just to get the variety.
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