Field notes, v1752
Page 665
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
J. Broth 1990 field notes 248. Animal Behavior Station, University of California, Berkeley, Dec 13 and other miscellaneous calls. some type 2 wild crossbills (cont'd) flew around the station on a few occasions, but captives did not respond, except ♀771 called at was not recorded. Dec 14 I tried to record "59" plus birds in his cell: 769 and 772. Also I brought out three new males from the cell of birds 425 and 306; they were numbered 773, 774, and 775. 773 had the left-crossing bill. 773 and 774 were recorded in "breed's" of song, also in loud, Type 1-sounding flight calls. 775 did not call. 769 and 772 gave only a few, Type 2-sounding calls. "59" also was recorded in flight and alarm calls. It was a cold, increasingly cloudy afternoon, and no wild crossbills were heard. I put 775 back in the cell until the next recording session. Dec 17 Brought out 306, 425, and three new birds from their cell: 775 (male, R), 776 (?) and 777 (male, L). 306 gave some toops, [not recorded] immediately, then was quiet. At 12:10 PM a lone, wild Type 2 bird flew over getting no vocal response from the decoys.