Date: 9/23/25 3:16 pm From: eBird alert via groups.io <alert.ebird...> Subject: [slocobirding] [eBird Alert] San Luis Obispo County Rare Bird Alert
*** Species Summary:
- Costa's Hummingbird (1 report)
- Yellow-crowned Night Heron (1 report)
- Little Blue Heron (1 report)
- Ash-throated Flycatcher (1 report)
- Black-and-white Warbler (2 reports)
- American Redstart (4 reports)
- Bay-breasted Warbler (1 report)
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Thank you for subscribing to the <daily> San Luis Obispo County Rare Bird Alert. The report below shows observations of rare birds in San Luis Obispo County. View or unsubscribe to this alert at https://ebird.org/alert/summary?sid=SN36231 NOTE: all sightings are UNCONFIRMED unless indicated.
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Costa's Hummingbird (Calypte costae) (2)
- Reported Sep 17, 2025 08:35 by Petra Clayton
- O'Donovan Road, Creston, San Luis Obispo, California
- Map: http://maps.google.com/?ie=UTF8&t=p&z=13&<q...>,-120.5075918&<ll...>,-120.5075918 - Checklist: https://ebird.org/checklist/S273978977 - Media: 9 Photos
- Comments: "Smaller than nearby Anna's Hummingbirds; white throat with the start of the purple gorget; white postocular stripe.
Upon further study of the images:
1. The reflected gorget color is a bright magenta interspersed slightly with other bright colors, as opposed to the deep almost blueish-purple color of a male Black-chinned.
2. Some of the freshly molted gorget feathers on the upper throat are very bright and do not contrast with molted gorget feathers on the lower throat. In a male Black-chinned some of these molted upper throat feathers would be contrastingly dark.
3. Photo #1 shows some bright magenta feathers molting in on the crown, which is not expected in a Black-chinned.
Click on the image below for a Flickr video, which includes Anna's Hummingbirds:
<a href="https://www.flickr.com/photos/jack-petra-clayton/54795083144/in/dateposted-public/" title="Costa's Hummingbird (Calypte costae), Creston, CA"><img src="https://live.staticflickr.com/31337/54795083144_abe367eb14_z.jpg" alt="Costa's Hummingbird (Calypte costae), Creston, CA" /></a>
Photos #6 - #9: Female:
Small size; green back; white throat and underparts; wingtips extending to the tip of the tail, making the tail appear short; gray cheek patch; white postocular stripe; slightly decurved bill."
Black-and-white Warbler (Mniotilta varia) (1)
- Reported Sep 23, 2025 11:02 by Andrew Fleming
- Meadow Park--San Luis Obispo, San Luis Obispo, California
- Map: http://maps.google.com/?ie=UTF8&t=p&z=13&<q...>,-120.6606531&<ll...>,-120.6606531 - Checklist: https://ebird.org/checklist/S275119813 - Comments: "Seen with the Claytons and Jason in the trees around where the path crosses the drainage ditch (35.2674354, -120.6598438). Sleek warbler with black and white stripes all over head and back. Mostly white throat and belly. Creeping up and down tree limbs like a nuthatch."
eBird Alerts provide recent reports of regionally or seasonally rare species (Rarities Alerts) or species you have not yet observed (Needs Alerts) in your region of interest; both Accepted and Unreviewed observations are included. Some reports may be from private property or inaccessible to the general public. It is the responsibility of every eBirder to be aware of and respectful of access restrictions. For more information, see our Terms of Use: https://www.birds.cornell.edu/home/terms-of-use/
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