San Mateo Co. Bird Observations from eBird
Full Year 2024
Click on a species name for a map & data.
PDF file available for download:
A Checklist Of The Birds Of
San Mateo County, California
Compiled by Peter J. Metropulos
for the Sequoia Audubon Society
April, 2006Download County Checklist
for printing on 8 ½ by 14 paper.
This page includes sightings from:
Peninsula Birding on groups.ioOctober 2025
Dear San Mateo County Birders,
San Mateo County birders found a total of 10 species that were new for the year by the end of October. The 10 new bird species will bring the total species observed by the end of the month to 327.
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. The definitions for the rarity codes can be found below the current month's list. The rarity code system was set up in 2009 By the late Kris Olson based on Peter Metropulos' codes on the San Mateo County Checklist which was published by The San Mateo County Bird Alliance (then Sequoia Audubon Society at time of publishing) in 2006. From this page, you can view the full list of the birds observed so far in 2025 plus download a checklist which shows seasonality, frequency, and county breeding information. Additionally, all monthly reports going back to 2009 can be found here.
Here are the new birds for October, their finders and locations where found:
One WHITE-WINGED DOVE (5) was observed at a home feeder in Pacifica by Paul Donahue. While birding Pie Ranch in Pescadero, Marty Freeland found a BLUE-HEADED VIREO (6). Gary Deghi spotted a YELLOW-GREEN VIREO (6) at Ocean Colony. During a visit to Maverick's Beach at Pillar Point, Cricket Raspet encountered a LAPLAND LONGSPUR (5) feeding in the wrack. Similarly, a SNOW BUNTING (6) was feeding in the wrack at the beach below Mirada Surf County Park found by Joanne Kerbavaz. Kent Forward photographed a BREWER'S SPARROW (4) at Fitzgerald Marine Reserve. Ron Thorn and Leonie Batkin discovered a MAGNOLIA WARBLER (4) at Shorebird Park off of Marine Parkway in Redwood Shores. While birding along Gazos Creek Rd. Jari Toivanen picked out a CANADA WARBLER (4) in the riparian habitat. Coming to a feeder was a PAINTED BUNTING (6) in Donna Pomeroy's El Granada yard. Avis Boutell obtained photos of a DICKCISSEL (6) at a blufftop location in Moss Beach.To stay informed of the latest bird news, consider creating an account with both Peninsula Birding (Pen-bird) and eBird. Please join and post your bird sightings to peninsula-birding@groups.io and/or www.eBird.org. When posting to Pen-bird, please include the date of your sighting in either the subject line or in the body of your email. When submitting records to eBird, if prompted for details for a rare or unusual bird, please add details which describe the bird using a physical description and field marks that helped you confirm the ID. Thank You eBird users for adding your descriptions and uploading your photos and audio to your checklists. 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.
About this Report: As a volunteer for the San Mateo County Bird Alliance we 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, please email: maliadances@yahoo.com
Malia DeFelice
San Mateo County Bird Alliance Volunteers
**Cumulative Year Report**
New Species Added per Month Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total 2009 214 13 17 21 18 5 6 16 8 13 2 2 335 2010 206 5 19 31 10 7 11 2 11 9 3 2 316 2011 212 8 14 30 13 5 12 8 16 8 4 3 334 2012 211 9 12 30 5 7 5 13 12 9 3 2 318 2013 207 11 21 20 14 5 11 10 11 10 5 2 327 2014 221 5 10 24 9 1 12 7 22 11 2 2 335 2015 216 16 24 17 16 6 4 8 18 2 2 1 331 2016 216 17 15 20 12 1 13 6 15 5 4 4 328 2017 218 8 19 35 13 3 6 9 17 8 3 3 341 2018 216 12 16 26 15 6 8 9 10 4 3 7 332 2019 209 7 29 17 15 3 2 12 13 7 2 6 322 2020 211 8 16 22 21 9 5 11 12 14 4 4 337 2021 208 11 16 19 12 3 7 12 14 7 5 2 316 2022 215 6 13 30 14 4 1 10 23 12 4 2 334 2023 213 11 12 29 11 5 2 10 20 19 3 3 338 2024 206 13 16 28 7 4 8 9 21 9 6 5 332 2025 215 9 17 25 6 8 12 9 16 10 327
SAN MATEO COUNTY 2025 CUMULATIVE YEAR LIST - October Species Date **Rarity *Observer Fulvous Whistling-Duck 6 Emperor Goose 6 Snow Goose 1/6/25 4 RGJ Ross's Goose 4 Greater White-fronted Goose 1/2/25 4 M.Ob. Brant 1/18/25 2 LPo Cackling Goose 1/2/2/5 4 JiMc Canada Goose 1/1/25 1 M.Ob. Tundra Swan 4 Wood Duck 1/1/25 3 Anon Blue-winged Teal 1/1/25 4 M.Ob. Cinnamon Teal 1/2/25 2 M.Ob. Northern Shoveler 1/1/25 2 M.Ob. Gadwall 1/1/25 2 M.Ob. Eurasian Wigeon 1/4/25 4 ACh, SLe American Wigeon 1/1/25 2 M.Ob. Mallard 1/1/25 1 M.Ob. Northern Pintail 1/1/25 2 M.Ob. Green-winged Teal 1/1/25 2 M.Ob. Canvasback 1/1/25 2 M.Ob. Redhead 3/9/25 4 DAB Ring-necked Duck 1/1/25 2 M.Ob. Tufted Duck 2/1/25 4 BTh Greater Scaup 1/1/25 1 M.Ob. Lesser Scaup 1/1/25 1 M.Ob. King Eider 6 Harlequin Duck 1/31/25 4 GC Surf Scoter 1/1/25 1 M.Ob. White-winged Scoter 1/19/25 4 RoFu Black Scoter 1/14/25 4 VM Long-tailed Duck 1/19/25 4 RoFu Bufflehead 1/1/25 2 M.Ob. Common Goldeneye 1/1/25 2 M.Ob. Barrow's Goldeneye 1/1/25 3 LB, RT Smew 6 Hooded Merganser 1/1/25 3 M.Ob. Common Merganser 1/1/25 2 M.Ob. Red-breasted Merganser 1/2/25 3 JTo Ruddy Duck 1/1/25 1 M.Ob. Mountain Quail 5 California Quail 1/1/25 1 M.Ob. Pied-billed Grebe 1/1/25 2 M.Ob. Horned Grebe 1/1/25 2 M.Ob. Red-necked Grebe 1/17/25 4 GC Eared Grebe 1/1/25 2 M.Ob. Western Grebe 1/1/25 1 M.Ob. Clark's Grebe 1/1/25 2 M.Ob. Band-tailed Pigeon 1/1/25 2 M.Ob. Common Ground-Dove 6 White-winged Dove 10/10/25 5 PDo Mourning Dove 1/1/25 1 M.Ob. Greater Roadrunner XTP Yellow-billed Cuckoo 6 Lesser Nighthawk 6 Common Nighthawk 6 Common Poorwill 6/9/25 4 CVB Chuck-will's Widow 6 Black Swift 5/27/25 4 MSt Chimney Swift 6 Vaux's Swift 3/29/25 3 CH White-throated Swift 1/1/25 3 M.Ob. Black-chinned Hummingbird 8/25/25 6 JuT Anna's Hummingbird 1/1/25 1 M.Ob. Costa's Hummingbird 6 Calliope Hummingbird 6 Rufous Hummingbird 3/13/25 2 MDF Allen's Hummingbird 1/11/25 1 MFr Broad-billed Hummingbird 6 Ridgway's Rail 1/10/25 3 IML Virginia Rail 1/1/25 3 M.Ob. Sora 1/3/25 3 DAB Common Gallinule 4 American Coot 1/1/25 1 M.Ob. Yellow Rail 6 Black Rail 5 Sandhill Crane 6 Black-necked Stilt 1/1/25 2 M.Ob. American Avocet 1/1/25 1 M.Ob. Black Oystercatcher 1/1/25 3 M.Ob. Black-bellied Plover 1/1/25 1 M.Ob. American Golden-Plover 5 Pacific Golden-Plover 1/4/25 4 RF Killdeer 1/1/25 2 M.Ob. Semipalmated Plover 1/1/25 2 M.Ob. Piping Plover 6 Mountain Plover 6 Snowy Plover 1/1/25 3 M.Ob. Whimbrel 1/1/25 2 M.Ob. Long-billed Curlew 1/1/25 2 M.Ob. Bar-tailed Godwit 6 Hudsonian Godwit 6 Marbled Godwit 1/1/25 1 M.Ob. Short-billed Dowitcher 1/1/25 1 TPo, BZ Long-billed Dowithcher 1/1/25 1 M.Ob. Wilson's Snipe 1/7/25 3 M.Ob. Wilson's Phalarope 7/28/25 4 RT Red Phalarope 5/28/25 2 ES, JM Red-necked Phalarope 4/13/25 2 RyM Spotted Sandpiper 1/1/25 3 M.Ob. Solitary Sandpiper 4 Wandering Tattler 2/16/25 4 JaMc Lesser Yellowlegs 1/4/25 4 RF Willet 1/1/25 1 M.Ob. Greater Yellowlegs 1/1/25 2 M.Ob. Ruddy Turnstone 1/1/25 3 TPo Black Turnstone 1/1/25 1 M.Ob. Red Knot 1/11/25 3 CRe Surfbird 1/1/25 2 M.Ob. Ruff 4/3/25 6 MFr Sharp-tailed Sandpiper 6 Curlew Sandpiper 6 Stilt Sandpiper 4 Buff-breasted Sandpiper 6 Sanderling 1/1/25 1 TPo Dunlin 1/1/25 1 M.Ob. Rock Sandpiper 4 Baird's Sandpiper 8/22/25 5 RRy Least Sandpiper 1/1/25 1 M.Ob. Pectoral Sandpiper 9/28/25 5 CH, MDF Western Sandpiper 1/1/25 1 M.Ob. Semipalmated Sandpiper 7/24/25 4 CH Long-tailed Jaeger 3 Parasitic Jaeger 7/27/25 2 TMcQ,DMcQ Pomarine Jaeger 4/27/25 3 CRSE South Polar Skua 8/10/25 3 ALVA Rhinoceros Auklet 2/5/25 1 RT Tufted Puffin 7/14/25 4 JTi Horned Puffin 5 Cassin's Auklet 5/4/25 2 CCHo Least Auklet 6 Parakeet Auklet 6 Long-billed Murrelet 6 Marbled Murrelet 1/19/25 3 RoFu Pigeon Guillemot 3/2/25 2 NSh Common Murre 1/1/25 1 M.Ob. Ancient Murrelet 4/9/25 3 RT Scripps's Murrelet 8/10/25 4 ALVA Guadalupe Murrelet 8/29/25 6 ALVA Craveri's Murrelet 8/10/25 6 ALVA Swallow-tailed Gull 6 Little Gull 6 Ross's Gull 6 Black-legged Kittiwake 2/9/25 3 M.Ob. Sabine's Gull 4/27/25 2 CRSE Bonaparte's Gull 2 Black-headed Gull 6 Laughing Gull 6 Franklin's Gull 4 Black-tailed Gull 6 Heermannn's Gull 1/1/25 1 JuMu Short-billed Gull 1/1/25 1 M.Ob. Ring-billed Gull 1/1/25 1 M.Ob. Western Gull 1/1/25 1 M.Ob. Kelp Gull 6 American Herring Gull 1/1/25 2 M.Ob. Vega Gull 1/15/25 6 NA Glaucous Gull 1/15/25 4 DBa Lesser Black-backed Gull 3/3/25 6 CH California Gull 1/1/25 1 M.Ob. Glaucous-winged Gull 1/1/25 1 M.Ob. Slaty-backed Gull 6 Iceland Gull 1/1/25 3 M.Ob. Black Skimmer 1/1/25 4 M.Ob. Least Tern 7/14/25 4 JTo Gull-billed Tern 6 Caspian Tern 1/5/25 2 M.Ob. Black Tern 5 Forster's Tern 1/1/25 1 M.Ob. Arctic Tern 8/10/25 2 ALVA Common Tern 5/10/25 2 HF Elegant Tern 3/16/25 2 JSho Royal Tern 6 Red-billed Tropicbird 6 Red-tailed Tropicbird 6 Red-throated Loon 1/1/25 2 M.Ob. Arctic Loon 6 Pacific Loon 1/1/25 1 JuP Common Loon 1/1/25 2 M.Ob. Yellow-billed Loon 6 Laysan Albatross 4/27/25 4 CRSE Black-footed Albatross 4/27/25 3 CRSE Short-tailed Albatross 5/1/25 6 CRSE Salvin's Albatross 6 Wilson's Storm Petrel 7/20/25 5 ALVA Fork-tailed Storm-Petrel 7/14/25 4 JTi Leach's Storm-Petrel 7/14/25 4 JTi Ashy Storm-Petrel 7/14/25 2 JTi Black Storm-Petrel 9/1/25 2 ALVA Wedge-rumped Storm-Petrel 6 Least Storm-Petrel 6 Northern Fulmar 3/2/25 1 MFr Murphy's Petrel 4/27/25 6 CRSE Hawaiian Petrel 6 Cook's Petrel 4/27/25 6 CRSE White-chinned Petrel 6 Streaked Shearwater 6 Pink-footed Shearwater 4/27/25 2 CRSE Flesh-footed Shearwater 9/1/25 5 ALVA Great Shearwater 6 Wedge-tailed Shearwater 6 Buller's Shearwater 8/10/25 2 ALVA Sooty Shearwater 3/11/25 1 RT Short-tailed Shearwater 9/1/25 4 ALVA Manx Shearwater 7/26/25 5 ALVA Black-vented Shearwater 5 Mottled Petrel 6 Stejneger's Petrel 6 Parkinson's Petrel 6 Wood Stork 6 Magnificent Frigatebird 6 Northern Gannet 1/1/25 6 JWJ Red-footed Booby 6 Cocos Booby 4/9/25 6 RT Masked Booby 6 Nazca Booby 6 Blue-footed Booby 6 Anhinga 6 Brandt's Cormorant 1/1/25 1 M.Ob. Pelagic Cormorant 1/1/25 2 M.Ob. Double-crested Cormorant 1/1/25 1 M.Ob. American White Pelican 1/1/25 4 JTo Brown Pelican 1/1/25 1 M.Ob. American Bittern 4 Least Bittern 2/15/25 6 ASi Yellow-crowned Night Heron 6 Black-crowned Night Heron 1/1/25 3 KPi Little Blue Heron 6 Snowy Egret 1/1/25 2 M.Ob. Green Heron 1/1/25 4 M.Ob. Western Cattle Egret 4 Great Egret 1/1/25 2 M.Ob. Great Blue Heron 1/1/25 2 M.Ob. White-faced Ibis 9/28/25 5 GD California Condor 6 Black Vulture 6 Turkey Vulture 1/1/25 2 M.Ob. Osprey 1/1/25 4 M.Ob. White-tailed Kite 1/1/25 3 M.Ob. Golden Eagle 1/2/25 4 RH Northern Harrier 1/1/25 3 M.Ob. Sharp-shinned Hawk 1/1/25 3 AGr, TMS-W Cooper's Hawk 1/1/25 2 M.Ob. Northern Goshawk 6 Bald Eagle 1/1/25 4 M.Ob. Red-shouldered Hawk 1/1/25 2 M.Ob. Broad-winged Hawk 9/23/25 5 CCho Swainson's Hawk 1/8/25 5 KGr Zone-tailed Hawk 6 Red-tailed Hawk 1/1/25 2 M.Ob. Rough-legged Hawk 4 Ferruginous Hawk 1/1/25 4 M.Ob. American Barn Owl 1/3/25 3 CCT Western Screech-Owl 1/8/25 2 MiA, SKr Snowy Owl 6 Great Horned Owl 1/1/25 2 M.Ob. Northern Pygmy-Owl 1/1/25 3 AlG Burrowing Owl 1/1/25 4 LF, TPo Spotted Owl 5 Barred Owl 2/18/25 6 JSt Long-Eared Owl 3 Short-eared Owl 1/14/25 3 RT Northern Saw-whet Owl 1/6/25 3 GHa Belted Kingfisher 1/1/25 3 M.Ob. Williamson's Sapsucker 6 Yellow-bellied Sapsucker 1/24/25 4 LB, RT Red-naped Sapsucker 4 Red-breasted Sapsucker 1/1/25 3 M.Ob. Lewis's Woodpecker 5/12/25 4 RT Acorn Woodpecker 1/1/25 2 M.Ob. Downy Woodpecker 1/1/25 2 M.Ob. Nuttall's Woodpecker 1/1/25 2 M.Ob. Hairy Woodpecker 1/1/25 2 M.Ob. Pileated Woodpecker 1/1/25 4 M.Ob. Northern Flicker 1/1/25 1 M.Ob. Crested Caracara 6 American Kestrel 1/1/25 2 M.Ob. Merlin 1/1/25 1 M.Ob. Peregrine Falcon 1/1/25 4 M.Ob. Prairie Falcon 2/17/25 5 JeP Olive-sided Flycatcher 4/16/25 3 M.Ob. Western Wood-Pewee 4/30/25 3 ER Willow Flycatcher 6/7/25 5 TP Least Flycatcher 6 Hammond's Flycatcher 4 Gray Flycatcher 4/14/25 5 ADu Dusky Flycatcher 5 Western Flycatcher 3/22/25 1 LoY, NPi Black Phoebe 1/1/25 2 M.Ob. Eastern Phoebe 5 Say's Phoebe 1/1/25 2 M. Ob. Vermilion Flycatcher 1/1/25 6 M. Ob. Dusky-capped Flycatcher 6 Ash-throated Flycatcher 4/13/25 2 RH Sulphur-bellied Flycatcher 6 Tropical Kingbird 1/1/25 4 JPe Cassin's Kingbird 5 Thick-billed Kingbird 6 Western Kingbird 3/25/25 4 DAB Eastern Kingbird 5 Scissor-tailed Flycatcher 6 White-eyed Vireo 6 Bell's Vireo 9/12/02 6 MFr Hutton's Vireo 1/1/25 1 M.Ob. Yellow-throated Vireo 6 Cassin's Vireo 4/10/25 2 ChH, LaH Blue-headed Vireo 10/14/25 6 MFr Plumbeous Vireo 6 Philadelphia Vireo 6 Warbling Vireo 3/22/25 2 M.Ob. Red-eyed Vireo 6/15/25 4 ADu Yellow-green Vireo 10/6/25 6 GD Loggerhead Shrike 1/4/25 3 RF Northern Shrike 6 Pinyon Jay 6 Steller's Jay 1/1/25 1 M.Ob. California Scrub-Jay 1/1/25 1 M.Ob. Yellow-billed Magpie 5 Clark's Nutcracker 6 American Crow 1/1/25 1 M.Ob. Common Raven 1/1/25 1 M.Ob. Mountain Chickadee 6 Chestnut-backed Chickadee 1/1/25 1 M.Ob. Oak Titmouse 1/1/25 1 M.Ob. Horned Lark 4 Bank Swallow 4/29/25 2 CH, MDF Tree Swallow 1/6/25 2 RLa, YM Violet-green Swallow 1/1/25 1 M.Ob. Purple Martin 4/24/25 4 NW Northern Rough-winged Swallow 3/1/25 2 KFo Barn Swallow 1/2/25 1 PGu Cliff Swallow 3/22/25 1 MLo Dusky Warbler 6 Bushtit 1/1/25 1 M.Ob. Wrentit 1/1/25 1 M.Ob. Ruby-crowned Kinglet 1/1/25 1 M.Ob. Golden-crowned Kinglet 1/1/25 2 M.Ob. White-breasted Nuthatch 1/1/25 2 M.Ob. Pygmy Nuthatch 1/1/25 1 M.Ob. Red-breasted Nuthatch 1/1/25 2 JMc Brown Creeper 1/1/25 1 M.Ob. Blue-gray Gnatcatcher 1/1/25 3 PGa, RiB Rock Wren 1/13/25 4 DavA Canyon Wren 6 Northern House Wren 1/2/25 3 JTs Pacific Wren 1/1/25 2 AlG Sedge Wren 6 Marsh Wren 1/1/25 2 JTa, PH Bewick's Wren 1/1/25 1 M.Ob. American Dipper 4 Gray Catbird 6 Brown Thrasher 6 California Thrasher 1/1/25 2 M.Ob. Sage Thrasher 3/10/25 5 SLe Northern Mockingbird 1/1/25 1 JTo Western Bluebird 1/1/25 3 M.Ob. Mountain Bluebird 6 Townsend's Solitaire 4 Varied Thrush 1/1/25 2 M.Ob. Swainson's Thrush 4/14/23 2 RyM Hermit Thrush 1/1/25 1 M.Ob. American Robin 1/1/25 1 M.Ob. Bohemian Waxwing 6 Cedar Waxwing 1/1/25 1 M.Ob. Phainopepla 5 White Wagtail 6 Red-throated Pipit 6 American Pipit 1/1/25 2 M.Ob. Evening Grosbeak 4 House Finch 1/1/25 1 M.Ob. Purple Finch 1/1/25 1 M.Ob. Cassin's Finch 6 Red Crossbill 1/1/25 3 LB, RT Cassia Crossbill 6 Pine Siskin 1/1/25 2 M.Ob. Lesser Goldfinch 1/1/25 1 M.Ob. Lawrence's Goldfinch 2/7/25 4 CH, MDF American Goldfinch 1/1/25 1 M.Ob. Lapland Longspur 10/9/25 5 CRa Chestnut-collared Longspur 5 Snow Bunting 10/27/25 6 JKe Rustic Bunting 6 Grasshopper Sparrow 4/7/25 2 M.Ob. Chipping Sparrow 4/10/25 2 CH Clay-colored Sparrow 2/16/25 4 LMu Black-chinned Sparrow 6 Field Sparrow 1/2/25 6 JiMc Brewer's Sparrow 10/7/25 4 KFo Black-throated Sparrow 6 Lark Sparrow 4/4/25 4 TCa Lark Bunting 9/3/25 5 GC American Tree Sparrow 5 Fox Sparrow 1/1/25 1 M.Ob. Dark-eyed Junco 1/1/25 1 M.Ob. White-crowned Sparrow 1/1/25 1 M.Ob. Golden-crowned Sparrow 1/1/25 1 M.Ob. Harris's Sparrow 5 White-throated Sparrow 1/1/25 4 M.Ob. Sagebrush Sparrow 6 Bell's Sparrow 6/7/25 5 CBi, GHa, Vesper Sparrow 9/22/25 4 JTo LeConte's Sparrow 6 Nelson's Sparrow 6 Savannah Sparrow 1/1/25 1 M.Ob. Song Sparrow 1/1/25 1 M.Ob. Lincoln's Sparrow 1/1/25 2 M.Ob. Swamp Sparrow 3/11/25 4 AGr, California Towhee 1/1/25 1 M.Ob. Rufous-crowned Sparrow 4 Green-tailed Towhee 9/29/25 5 CRa Spotted Towhee 1/1/25 1 M.Ob. Yellow-breasted Chat 5/10/25 4 STa Yellow-headed Blackbird 6/2/25 4 TiTu Bobolink 4 Western Meadowlark 1/1/25 1 M.Ob. Orchard Oriole 1/1/25 4 RiB Hooded Oriole 3/25/25 2 AGr Bullock's Oriole 1/15/25 2 SLe Baltimore Oriole 6 Scott's Oriole 6 Red-winged Blackbird 1/1/25 1 M.Ob. Tricolored Blackbird 1/1/25 1 CH, MDF Brown-headed Cowbird 1/1/25 2 M.Ob. Rusty Blackbird 6 Brewer's Blackbird 1/1/25 1 M.Ob. Great-tailed Grackle 1/6/25 3 CH Ovenbird 5 Worm-eating Warbler 9/17/25 6 AMa,NA,RyM Northern Waterthrush 8/16/25 4 MFr Golden-winged Warbler 6 Black-and-white Warbler 6/29/25 4 DeSi, MFr Prothonotary Warbler 5 Tennessee Warbler 1/1/25 4 CH, MDF Orange-crowned Warbler 1/1/25 3 M.Ob. Lucy's Warbler 1/2/25 4 CH, MDF Nashville Warbler 1/21/25 4 DaC, SLe Virginia's Warbler 4 Connecticut Warbler 6 MacGillivray's Warbler 4/13/25 3 DMo,MeMo Mourning Warbler 6 Kentucky Warbler 6 Common Yellowthroat 1/1/25 2 M.Ob. Hooded Warbler 6/13/25 4 LB, RT American Redstart 3/21/25 4 CH Cape May Warbler 9/21/25 6 LB, RT Northern Parula 9/14/25 4 MFr Magnolia Warbler 10/2/25 4 LB, RT Bay-breasted Warbler 6/7/25 6 STa Blackburnian Warbler 9/21/25 4 MFr Yellow Warbler 1/1/25 2 LB, RT Chestnut-sided Warbler 9/12/25 4 FiGu Blackpoll Warbler 9/21/25 4 MFr Black-throated Blue Warbler 4 Palm Warbler 1/4/25 4 M.Ob. Yellow-rumped Warbler 1/1/25 1 M.Ob. Yellow-throated Warbler 6 Prairie Warbler 5 Black-throated Gray Warbler 4/6/25 2 GC Townsend's Warbler 1/1/25 1 M.Ob. Hermit Warbler 1/6/25 2 RV Black-throated Green Warbler 5 Canada Warbler 10/12/25 4 JTo Wilson's Warbler 1/11/25 1 MFr Painted Redstart 6 Summer Tanager 1/3/25 5 MKa Scarlet Tanager 6 Western Tanager 1/11/25 2 AmG, BiA Rose-breasted Grosbeak 1/12/25 4 CH, MDF Black-headed Grosbeak 1/1/2/25 2 RebH Blue Grosbeak 4 Lazuli Bunting 4/29/25 2 M.Ob. Indigo Bunting 7/8/25 4 KGr Painted Bunting 10/3/25 6 Dpom Dickcissel 10/10/25 6 AvB Introduced Species; nesting species originally released from captivity Ring-necked Pheasant 4 Wild Turkey 1/1/25 3 M.Ob. Eurasian Collared-Dove 1/1/25 3 M.Ob. Rock Pigeon 1/1/25 1 M.Ob. European Starling 1/1/25 1 M.Ob. House Sparrow 1/1/25 1 M.Ob. 327 species recorded so far this year 68% of 479 total recorded species in San Mateo Co. and its offshore waters
* Rarity:
1 = Common to abundant in appropriate habitat, always present in large numbers
2 = Fairly common, always present in moderate to small numbers
3 = Uncommon, usually present and in small numbers
4 = Rare, observed in very small numbers and perhaps not in each year
5 = Extremely rare, fewer than 10 records of occurrence in season indicated
6 = Accidental, recorded fewer than 10 times in San Mateo County and offshore waters**San Mateo County Observers
ACh=Alice Church, ADu=Adam Dudley, AGr=Alane Gray, AlG=Alan Green, AMa=Aaron Maizlish,
AmG=Amy Galloway, Anon=Anonymous, ASi=Aidan Sinha, AvB=Avis Boutell
BiA=Bilal Al, BTh=Barry Thomson, BZ=Brooke Zhou
CBi=Curt Bianchi, CCho=Caitlin Chock, CCT=Cello Caruso-Turiello, CH=Chris Hayward,
ChH=Cheri Horkman, CRa=Cricket Raspet, CRe=California Redwood, CVB=Cedrik von Briel, CRSE=Commercial Cruise Line, CTu=Carl Tuttle
DAB=DorianAndersonBike, DaC=Daniel Chen, DavA=David Amamoto, DBa=Dana Bangs,
DeSi=Dessi Sieburth, DMcQ=David McQuade, DMo=Dominik Mosur, Dpom=Donna Pomeroy
ER=Edward Rooks, ES=Eva Seay
FiGu=Field Guides Tour
GC=George Chrisman, GD=Gary Deghi, GHa=Garth Harwood,
HF=Howard Friedman
IML=Inger Marie Laursen
JaMc=Jake McCumber, JeP=Jeff Pace, JiMc=Jimmy McGuire, JKe=Joanne Kerbavaz, JM=Joe Morlan, JMc=Josh McLaughlin, JPe=John Perry, JSt=Joshua Stacy, JSho=Jake Shorty, JTa=Jane Tatchell,
JTi=Jim Tietz, JTo=Jari Toivanen, JTs=John Tsortos, JuMu=Julio Mulero, JuP=Julie Parsonnet, JuT=JulianTattoni, JWJ=James Watts Jr.
KFo=Kent Forward, KGr=Keith Gress, KPi=Karen Pinckard
LaH=Larry Horkman, LB=Leonie Batkin, LF=Leslie Flint, LMu=Liam Murphy, LoY=Loni Ye,
LPo=Linda Pors
MDF=Malia DeFelice, MeMo=Megan Mosur, MFr=Marty Freeland, MiA=Mike Ambrose,
MKa=Malini Kaushik, MLo=Michael Long, M.Ob.=Multiple Observers/Observations, MSt=Marcus Stephens
NA=Noah Arthur, NPi=Nicholas Pino, NSh=Nilesh Shah, NW=Nils Warnock
PDo=Paul Donahue, PGa=Paul Gater, PGu= Paulo Guimaraes, PH=Peter Headland,
RebH=Rebekah Holtsclaw, RF=Rich Ferrick, RGJ=Richard Jeffers, RH=Richard Hopf, RiB=Richard Bradus, RLa=Rachel Lawrence, RoFu=Robert Furrow, RRy=Russell Ryan, RT=Ron Thorn, RV=Reinhard Vehring, RyM=Ryan Mense
SKr=Sonja Kramer, SLe=Summer Lee, STa=Sam Talarigo
TCa=Theresa Calpotura, TiTu=Tiana Turner, TMcQ=Tammy McQuade, TMS-W=Terri M. Sanislo-Williams, TP=Troy Pittock, Travis B. Poitras=TPo
VM=Virginia Marshall,
YM=Yvette MacDonald