Pacific-slope flycatchers feed almost entirely on insects caught in the air or on tree and bush leaves. They prefer to forage in the middle and lower canopy of forests. They use a hawking method of prey capture; sallying forth from a perch to catch insects on the wing, then returning to the perch. Their main foods are bees, wasps, moths, spiders, flies, and other insects, though they occasionally consume vegetation like blackberry and elderberry leaves.
Animal Foods: insects
Plant Foods: leaves
Primary Diet: carnivore (Insectivore )