Date: 5/15/25 10:38 am From: maliadances via groups.io <maliadances...> Subject: [pen-bird] San Mateo County Cumulative Year-list Report for --- April 2025
*Greetings Pen-birders,*
San Mateo County birders found a total of 25 species that were new for the year by the end of April. But first, a VAUX’S SWIFT (3) was found by Chris Hayward at the end of March at Jasper Ridge Biological Preserve and was missed in the March report. So, the 26 new bird species will bring the total species observed by the end of the fourth month to 266.. 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.* http://www.sequoia-audubon.org/SMCbirds.php ( http://www.sequoia-audubon.org/SMCbirds.php )
*Here are the new birds for April, their finders and locations where found:*
RED-NECKED PHALAROPE (2) was observed by Ryan Mense at Pigeon Point. Marty Freeland found a RUFF (6) in the old salt evaporators along Seaport near the Westpoint Harbor in Redwood City. During a 3-hour seawatch at Pigeon Point, Ron Thorn observed ANCIENT MURRELETS (2) and an adult male COCOS BOOBY (6). Repositioning cruises are starting up and the first one to report in San Mateo County waters revealed POMARINE JAEGER (3), SABINE’S GULL (2), LAYSAN ALBATROSS (4), BLACK-FOOTED ALBATROSS (3), MURPHY’S PETREL (6), COOK’S PETREL (6) and PINK-FOOTED SHEARWATER (2). OLIVE-SIDED FLYCATCHER (3) was encountered by Multiple Observers at different locations. While visiting Jasper Ridge Biological Preserve, Edward Rooks noted WESTERN WOOD-PEWEE (3). Adam Dudley photographed a GRAY FLYCATCHER (5) along the SF Bay Trail. (Richard Hopf reported ASH-THROATED FLYCATCHER (2) at Windy Hill OSP. The first CASSIN’S VIREO (2) was recorded with audio by Cheri and Larry Horkman at Longridge OSP. Malia DeFelice and Chris Hayward noted BANK SWALLOW(2) arrivals at Año Nuevo SP and Nils Warnock observed a PURPLE MARTIN (4) at the same location. Ryan Mense made audio recordings for the first SWAINSON’S THRUSH (2) observation at Burleigh Murray SP. GRASSHOPPER SPARROW (2) were reported by Multiple Observers at Edgewood County Park on the same day. While birding La Honda Creek OSP Chris Hayward photographed CHIPPING SPARROW (2) and a LARK SPARROW (4) was photographed at Filoli by Theresa Calpotura. Dominik and Megan Mosur discovered MACGILLIVRAY’S WARBLER (3) at Burleigh Murray SP. George Chrisman reported BLACK-THORATED GRAY WARBLER (2) at his home. LAZULI BUNTING (2) were detected by Multiple Observers at multiple expected locations on the same day.
*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
*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,
