Checklist S26153971

Observations

1. Anna's Hummingbird

   Number observed:  5

2. Acorn Woodpecker

   Number observed:  3

3. Northern Flicker

   Number observed:  1

4. Black Phoebe

   Number observed:  1

5. Say's Phoebe

   Number observed:  1

   Details

   Audio recording of its calls.

6. California Scrub-Jay

   Number observed:  1

7. American Crow

   Number observed:  1

8. Common Raven

   Number observed:  5

9. Mountain Chickadee

   Number observed:  1

10. Ruby-crowned Kinglet

    Number observed:  3

11. Red-breasted Nuthatch

    Number observed:  1

12. Bewick's Wren

    Number observed:  1

13. European Starling

    Number observed:  5

    Exotic: Naturalized

14. Western Bluebird

    Number observed:  20

15. Hermit Thrush

    Number observed:  1

16. American Robin

    Number observed:  10

17. Cedar Waxwing

    Number observed:  100

    Details

    Audio recording.
    
    Also available on Xeno-Canto at:
    http://www.xeno-canto.org/293549

    Media

18. House Finch

    Number observed:  10

19. Red Crossbill (Western Hemlock or type 3)

    Number observed:  6

    Details

    Identified as red crossbills by voice. Also seen in flight. Audio recordings. I used the recordings to generate audio spectrograms, which show the classic signature of a common flight call type 3 variant as defined by Groth (1993). In particular, the calls start with a rapid drop, then a rapid rise in frequency, followed by another deep drop in frequency, giving each call a "zig-zag" pattern. Many of the calls on the file below also have a kink in the last down-ward slurring part of the vocalization. The initial rapid downward part of the calls is hard to see in the spectrogram below because eBird does not zoom in the spectrogram at sufficiently high time resolution for it to stand out.
    
    Type 3 identification has been verfied by Matt Young at the Cornell Lab of Ornithology.
    
    Howard King, Curtis Marantz, and I saw the birds fly out from non-native pines and go east. There were at least six birds in the group. The volume of the flight calls decreases as the birds moved away. The spectrogram below shows that all the calls were type 3.
    
    The audio recording below is also available on Xeno-Canto at:
    http://www.xeno-canto.org/293912

    Media

20. Lesser Goldfinch

    Number observed:  10

21. White-crowned Sparrow

    Number observed:  5

22. California Towhee

    Number observed:  2

23. Yellow-rumped Warbler (Audubon's)

    Number observed:  30