Displacing vermilion flycatchers were observed on 3 occasions in costal and Andean Ecuador, and during 1-season in southeastern and south central Arizona, but notes were made on display flights only in the latter area. The notes cover over 20 display flights, including instances in which several flights seen within 1 observation period were similar and given only 1 description. In the most complete (or most complex) of these a bird would fly up from his perch to a height of about 40 ft. level off and flutter forward in either a straight or a curved path. Every few feet he would rise slightly and stall or almost stall, then continue forward. Each stall was marked by a strong upward stroke of the wings, and a pronounced arching of the bird''s axis in which the head was pulled back between the shoulders and the tail elevated at least slightly above the horizontal. Wing beats ceased briefly at each stall as the bird pitched forward to its former level, but I did not see this extended into a glide. The wing beat between stalls was rapid and shallow, with the wings kept above the back (although not as high as they were during the stalls). After several stalls the bird usually completed the display flight by dropping to a perch in a series of swooping glides, often with the tail cocked high. Most of the stalls came within the period of level flight after the initial climb, but one or more sometimes occurred while climbing. In one case stalls occurred only during the climbing phase, and the bird apparently terminated the flight when he reached a treetop perch. The feathers of the chest and apparently of the crown are ruffled during at least the stalls.