. The condor. Birds; Birds; Birds. i8 THE CONDOR Vol. IX NESTING OF THE PINE SISKIN IN CALIFORNIA BY H. W. CARRIGRR AND J. R. PUMBKRTON DITRING the months of April, May and June, of 1903 and 1904, the writers examined in San Mateo and San Francisco Counties some twenty-five sets of the eggs of the pine siskin (Spiniis pinus pim/s). Owing to the loss of Car- riger's collection and notes in the San Francisco fire the number of sets taken is not exactly known, but approximately ten sets were taken. To the writers' know- ledge these are the only authentic eggs of this bird ever taken in California
. The condor. Birds; Birds; Birds. i8 THE CONDOR Vol. IX NESTING OF THE PINE SISKIN IN CALIFORNIA BY H. W. CARRIGRR AND J. R. PUMBKRTON DITRING the months of April, May and June, of 1903 and 1904, the writers examined in San Mateo and San Francisco Counties some twenty-five sets of the eggs of the pine siskin (Spiniis pinus pim/s). Owing to the loss of Car- riger's collection and notes in the San Francisco fire the number of sets taken is not exactly known, but approximately ten sets were taken. To the writers' know- ledge these are the only authentic eggs of this bird ever taken in California and a short description of their taking may not be uninteresting to Condor readers. The taking of a male siskin wnth testes fully developed on April 5, in Marin County, and the seeing of several pairs of birds in San Mateo County a few days later, led to the suspicion that the birds were nesting in the vicinity. TYPICAL XKST OV PINK SISKIX IX CYPRESS of San Francisco. Diligent searching for the birds had its result, and on April 12, 1903, a small settlement of siskins was discovered in San Mateo County about a mile from San Francisco Bay. During the following two months every opportu- nity was taken to study this interesting bird. On April 12, 1903, two partially built nests were found by watching the birds carrying dry grass from the fields to the nests. On April 23, 1903, our first set of eggs was taken from nest number two. The nest was twelve feet from the ground, on the top of a long c^'press limb which hung directly over a well-traveled road. There were four eggs in this set, and one would have thought them worth four hundred dollars from the care we took in packing them. Of over forty nests found of the pine siskin, only one was not built in a cypress tree, and this one was in the very top of a fifty-foot eucalyptus. The nests were built in full-grown cypress trees planted in rows along roads or as division- lines between fields. Nests were usually about twelve or fifte
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