First swallows I've seen this year.
Working the trunk and limbs of several cottonwoods. Two other trunk creepers were present in these same trees and from time to time one would chase the other. There was a Red-breasted Nuthatch and a Brown Creeper.
This bird was going after insects the way a flycatcher should in the mid to upper conopy of cottonwoods on east bank of San Lorenzo River. I don't think I would have been confident identifying this bird if I had been alone, but I was with members of the Santa Cruz Bird Club, including Steve Gerow, who are reliable at identifying species like this.
The following birds were also seen nearby: