Feb 21 Academy Bay, Isla Santa Cruz, Galapagos. Metted and the week stretches considerably. 4 birds chasing each other, as if in pairs, repeated called a soft rough "pre pre pre prew" each about 1 second long. I heard not other calls today. The birds are usually silent when found. I saw Vermilion Flycatchers frequently from the Guamos up to where I turned back. The perched very high, usually on the highest trees, while Myiarchus tended to perch much lower. I saw mostly red males but 4 or 5 yellow plumaged birds, 2 of which seemed clearly to be attached to a Red male. The flight song was given frequently; must have seen and heard it 20 times. The performance was always basically the same, although the length varied considerably. The bird rose 15 to 25 feet above the vegetation and circled calling a rapid soft series "chew wit (snap)" c. 1/4 sec. long and 1/2 seen between calls. From below the bird looks long tailed; its wings extend straight out on the foreward edge and the primaries are broadly spread. The flight undulates up and down, rising on each call, the snap just after the peak of the rise. The bird flaps a rapid shadow wing beat on the down + up part of the arc about 15-20 strokes, then a short glide. In the glide wings are held quite high above the body and the snaps seems to occur when