During the breeding period, these birds eat insects, catching them in flight. They also eat spiders. The rest of the year, they eat fruit (cherries, blackberries, raspberries, apples, grapes, highbush cranberries, crabapple, etc.) and berries (especially juniper and mountain-ash). This means that they are highly dependent on the plants in their habitat and on weather conditions that affect fruit production. They also eat flower petals and buds.
Bohemian waxwings frequent birdfeeders in winter. Some bird lovers even collect and freeze large quantities of mountain ash berries to feed these birds in winter.
Bohemian waxwings do not obtain water from the fruit they eat, but instead have to drink directly from a pond, stream, fountain or birdbath.
During the mating period, the Bohemian waxwing only feeds on insects and spiders.