Which specific berries are documented as favorites consumed during the post-breeding period?

Answer

Wild grapes, serviceberries, chokecherries, and elderberries

When the Western Tanager shifts its diet to fruit during migration preparation, the specific berries consumed vary based on local geography and seasonal availability. However, several specific types have been documented as favorites. These include wild grapes, serviceberries, chokecherries, and elderberries. When foraging in fruiting shrubs or thickets, the tanager spends significant time consuming these small, fleshy fruits to accumulate the necessary carbohydrate fuel reserves for its southward journey.

Which specific berries are documented as favorites consumed during the post-breeding period?
dietbirdanimalWestern Tanager