A male YBSA was observed at about 11:30 a.m.. Saturday in conifers just southwest of the tennis courts on the west side of the park. We watched it making neat rows of sap wells in a medium-tall pine. We spotted it while looking at a well-hidden red-tailed hawk on an enormous nest near the top of one of the tall old conifers on the west side. The RTHA''s apparent mate, with classic screeching call, flew in from the Catholic church spires at 23rd Avenue and York at the park's northwest tip to perch briefly in the treetop above the nest.
These sightings were near the end of a DFO field trip meant to observe the colonial waterbird nesting sites in Duck and Ferril lakes. We counted more than 425 double-crested cormorants in the Duck Lake island trees and two black-crowned night-herons, the first two in City Park this season, on the island ground,. Still no BCNH's or snowy egrets yet on the Ferril Lake island site.
Although it was cold to start, the predicted rain and snow never materialized, allowing our small group of 4 to record other good birds among 30 species total. Highlights included a female Cooper's hawk on a newly built nest south of Ferril Lake (first seen building the nest last Sunday) 2 ruby-crowned kinglets in the "pinetum" of conifers on the slope below the south end of the Denver Museum of Nature & Science, a handsome male cinnamon teal on Ferril Lake, and a great blue heron that perched for a short while atop one of the trees at the high-occupancy Duck Lake cormorant rookery.
Patrick O'Driscoll
Denver
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