Date: 10/16/25 11:07 am From: maliadances via groups.io <maliadances...> Subject: [pen-bird] San Mateo County Cumulative Year-list Report for --- September 2025
*Greetings Pen-birders,*
San Mateo County birders found a total of 16 species that were new for the year by the end of September. The 16 new bird species found in September will bring the total species observed by the end of the ninth month to 317. In reading the following, please note, the number in parenthesis next to the bird name is the rarity code assigned for San Mateo County birds. *From the link below* , you can *see definitions for the rarity codes,* *download a checklist* which shows seasonality, frequency, and county breeding information, *find a full list of the birds* observed so far in 2025 *, plus* *all monthly reports going back to 2009. Click link below:*
*Here are the new birds for September, their finders and locations where found:*
Malia DeFelice spotted a PECTORAL SANDPIPER (5) on a mudflat along Pilarcitos Creek at Venice State Beach. Several Alvaro’s Adventures pelagic trips in September encountered BLACK STORM-PETREL (2), FLESH-FOOTED SHEARWATER (5), and SHORT-TAILED SHEARWATER (4). Gary Deghi spotted a group of WHITE-FACED IBIS (5) flying over Ocean Colony in Half Moon Bay. Caitlin Chock observed a BROAD-WINGED HAWK (5) at San Bruno Mountain. Marty Freeland found the following birds; BELL’S VIREO (6) Cascade Creek along Hwy 1, NORTHERN PARULA (4) Seaside School Rd. riparian, BLACKBURNIAN WARBLER (4) Sanchez Adobe Pacifica, BLACKPOLL WARBLER (4) Pilarcitos Ave. X Oak Ave. riparian. George Chrisman came across a LARK BUNTING (5) at Gazos Creek beach. Jari Toivanen discovered a VESPER SPARROW (4) in a Canvasback Way neighborhood in Redwood Shores. Cricket Raspet photographed a GREEN-TAILED TOWHEE (5) at a location along Sunshine Valley Rd. in Moss Beach. Ron Thorn and Leonie Batkin discovered a CAPE MAY WARBLER (6) while visiting Cypress Lawn Cemetery. Field Guides birding tour with Chris Benesh and Alex Sundvall located a CHESTNUT-SIDED WARBLER (4). WORM-EATING WARBLER (6) was reported somewhere along Gazos Creek by Aaron Maizlish as being found by he and Noah Arthur. Ryan Mense was able to re-find and photograph this warbler a distance from where it was originally reported.
*Birding San Mateo County:* There are plenty of ways to see birds. Did you know *The San Mateo County Bird Alliance leads birding Field Trips* on a regular basis? To join a field trip, check out their schedule here: http://www.sequoia-audubon.org/fieldtrips.html
*Alvaro’s Adventures runs offshore pelagic trips* now through October, with many seabird, whale and sea-life finding trips out of Half Moon Bay and other ports. Alvaro’s pelagic schedule here: https://www.alvarosadventures.com/pelagic-dates-2025.html
*To stay informed of the latest bird news, consider creating an account with both Peninsula Birding (Pen-bird) and eBird.* To join eBird, simply go to https://ebird.org/home and create an account. To join the Peninsula Birding group, join here: https://groups.io/g/peninsula-birding You can post your sightings there and be kept informed of sightings throughout the county including discussions about birds, population trends, where-can-I-find topics, events, field trips, webinars, pelagic trips and conservation issues. You can engage with other members of the birding community and can connect with online/offline discussions.
*This Report:* As a volunteer for the San Mateo County Bird Alliance I gather content for this report, each month, by primarily using eBird and Pen-bird. When posting to Pen-bird, please include the location and date of your sighting in either the subject line or in the body of your email. If you don’t use eBird or Pen-bird, you can always email me directly. Thank you!
If you have questions or comments regarding this report, or if I missed something,
