Thrush movement in southern Marin County
- Calbirders and local listerve members,
Sorry for the cross posts.
No, this is not an alert that rare birds are showing up, just a note of a
spectacular migration that I witnessed at the Hawk Watch in the Marin
Headlands just north of the Golden Gate bridge in southern Marin County on
November 3rd and 4th. I bird here quite often in the fall to get an idea
of passerine migration but have never witnessed the immensity of this
thrush migration (from sunrise around 6:30 'til about 8 am when it dropped
off significantly). Here are some numbers of a few species:
November 3rd November 4th
American Robin 4214* 2610
Varied Thrush 136 3190!!!!!!!!!!**
Cedar Waxwing 727 998
Band-tailed Pigeon 911 964
Pine Siskin 94 95
Purple Finch 38 70
CASSIN'S FINCH 2 0
House Finch 60 85
Lesser Goldfinch 40 54
American Goldfinch 40 12
Water Pipit 49 23
Yellow-rumped Warbler 65 116
Starling 175 yes
Double-crested Cormorant 75 30
"Yellow"-shafted Flicker 1 (may have been a hybrid - didn't see malar)
PALM WARBLER 1 0
* included one flock of 1200 which took five minutes to pass - may be an
** my previous high was 363 on a day in mid-October (can't find exact date),
1996 and 281 on October 16, 1995.
Weather on Saturday morning was calm with low ground fog but clear at eye
level. A full moon the previous night. Sunday was basically the same but
with a 10 mph north wind in the morning and reduced ground fog.
I have no idea whether the number of thrushes was great compared to any
other year since I'm only able to get there on weekends (as we all know,
most birds migrate between Monday and Friday).
Question for birders in San Francisco, San Mateo, Santa Clara and Santa
Cruz Counties - did anyone note a sudden influx in American Robins and
Varied Thrushes over the weekend?
If anyone goes to this sight at first light for the passerines, please drop
me a line and let me know what you see as I want to get a more complete
picture of migration at this sight.
Thanks and good birding.......
San Jose, CA