We processed 317 birds of 22 species in May; 183 were newly banded, and 134 were recaptures. We opened our nets on 13 days, with our volunteers donating 284 hours of their time.
In May, we captured 4 new species for 2014: Lazuli Bunting, Warbling Vireo, Western Scrub-Jay, and Yellow Warbler. Lazuli Buntings are common breeders at elevation in Santa Clara County, but are uncommon at CCFS. We typically catch between 1 and 3 each year during spring migration (fall migrants are much rarer). Warbling Vireos are also common breeders in Santa Clara County but uncommon at CCFS, and their abundances at the field station have declined over the past decade. Currently, we catch between 0 and 3 per year, mostly evenly split between spring and fall migration. Western Scrub-Jays are ubiquitous residents throughout Santa Clara County and at CCFS, though we don’t often catch them due to their large body size. Yellow Warblers breed in riparian corridors in Santa Clara County, although they don’t breed at CCFS. We generally catch around 5 – 10 individuals in the spring, and a significantly higher number in the fall.
Our most common March captures were Song Sparrow (80), Common Yellowthroat (50), Swainson’s Thrush (47), Bewick’s Wren (28), and Bushtit (27). We caught only a single individual of the following species: Golden-crowned Sparrow, Northern Mockingbird, Nuttall’s Woodpecker, and Western Scrub-Jay.