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Vocalizations made by two individuals engaging in aerial persecutions.
Quite surprised to see this species at this elevation. At first glance thought they were Vaux's, but once we observed them well the pale gray lower back and rump was obvious. We were on a ridge and they often times were flying below us at very close range. They were later joined by a flock of Vaux's, but they would eventually separate out again. Will upload audio recordings. This is the highest elevation at which I have seen this species in CR.