Field notes, v1471
Page 357
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
Marshall, 1941-2 Otus trichopsis Mt. Carmagnine Dec 25- Jan 16 Abundant - as many as 4 or 6 heard every time night hunted in finea only. The pair taken Jan 10 was the only record from oaks or growth outside of finea, but these were n't on the edge of finea. Altho I tried many times to call them up in all other types of native growth - oaks, pines, deep oak woods, etc. - they were never found there. But very abundant on finea. Would answer readily my imitated hoots at dusk, & would call when I gave Cicada hoots later in night & often would answer Otus hoots also. Often heard calling in night of own accord - 1 ♂ on moonlit night & often single ♀'s heard calling as I walked along trails in finea at night. Calls: 1.) 9-13 low whistle (as low as can whistle distinctly) at even temp & pitch except that 1st may be a little higher or min. 3rd higher; 2.) one short note followed by (3) or usually 4 long notes, and repeated - given when birds more excited. Very rhythmic · '---·'--- etc. ♂ a major 3rd or more above ♂ in pitch. ♀'s much shyer - call less & can't approach. Foraging: watched on several occasions: sit right in coffee bush 6"- 6' above gnd. - perch a while, look around, fly to another bush, - perching often on little leafy twigs. Rapid flight. Mostly paired but 5 ♂'s taken during usualy call from coffee bushes- course of 2 weeks from same spot. rarely in taller trees.