These dainty gems often vary food quest from flowers to sap exudations of trees. They swirl from one sticky excresence to another, selecting insect tidbits. A well-balanced meal! The females do all the housebuilding, erecting the tiny structure with tremulous whirling motions as though the down was clay. However, when courting males use the same pendulum swing as the Rubythroat, the arc is much smaller, only three or four feet in extent.