San Diego County sits at one of the most strategically positioned crossroads on the entire Pacific Flyway, making it a magnet for warblers that range from reliable year-round residents to jaw-dropping rarities that send local birders scrambling with their binoculars. The region’s remarkable habitat diversity — coastal scrub, riparian corridors, oak woodlands, chaparral, and desert-edge environments — creates a mosaic of micro-ecosystems that different warbler species exploit at different times of year.
Whether you’re a seasoned lister hoping to tick a Prothonotary Warbler off your San Diego County life list or a newcomer just learning to separate a Yellow-rumped from a Townsend’s, this guide covers all 22 warbler species recorded with meaningful regularity in the county. For each species, you’ll find identification essentials, seasonal status, preferred habitats, and the behavioral quirks that make finding them a little easier.
Pro Tip: Point Loma — particularly Cabrillo National Monument and Collier Park — is San Diego’s single most productive warbler hotspot during fall migration. Arriving early on calm mornings in late September and October can produce double-digit warbler species in a single visit.
1. MacGillivray’s Warbler
MacGillivray’s Warbler (Geothlypis tolmiei) is one of the more skulking migrants passing through San Diego County each spring and fall, hugging dense tangles of willows, cattails, and low brush so tightly that many birders hear its sharp, clipped “chuck” call long before they ever catch a clean view. Males are striking birds — slate-gray hood, broken white eye arcs, olive-green back, and a clean yellow belly — while females wear a paler, washed-out version of the same pattern.
In San Diego, MacGillivray’s is primarily a spring and fall transient, moving through from late April into early June and again from mid-August through October. It’s most reliably found in riparian thickets along the San Diego River, Mission Trails Regional Park, and the willow-choked margins of Sweetwater Marsh. A small number occasionally linger into early winter, but confirmed breeding records in the county are essentially absent. Patience is the key virtue with this species — standing quietly near dense cover and waiting for movement almost always outperforms active searching.
2. Yellow-breasted Chat
The Yellow-breasted Chat (Icteria virens) occupies a famously peculiar taxonomic position, having been moved out of the wood-warbler family entirely and into its own monotypic family, Icteriidae, though it remains deeply embedded in the cultural identity of warbler watching across North America. It’s the largest bird in this guide by a significant margin, with a chunky body, thick bill, long tail, and an almost comically loud and varied song that sounds more like a mockingbird auditioning for a variety show than anything warbler-like.
San Diego County holds one of California’s more reliable breeding populations of Yellow-breasted Chat, concentrated in dense riparian thickets — particularly willows and wild grape tangles — along the San Diego River, Sweetwater River, and Otay River valleys. Breeding birds arrive in late April and May, and the species is present through September. Fall migrants occasionally appear at coastal sites like Point Loma. Despite its bright yellow breast and white spectacles, actually seeing one perched in the open requires considerable luck; the chat’s preferred response to observer pressure is to dive deeper into the brush and continue singing from invisibility.
Key Insight: The Yellow-breasted Chat’s song is so complex and varied — incorporating whistles, cackles, rattles, and mimicked phrases — that it was once thought to be multiple species calling simultaneously when early naturalists first encountered it.
3. Orange-crowned Warbler
Among San Diego’s warblers, the Orange-crowned Warbler (Leiothlypis celata) holds the distinction of being one of the most consistently present species throughout the year. It’s not a flashy bird — dull olive-green overall with faint dusky streaking on the breast and the rarely visible orange crown patch that gives it its name — but it rewards patient observers with its energetic foraging style and willingness to occupy a wide range of shrubby habitats.
San Diego County hosts both breeding and wintering populations of Orange-crowned Warblers, with the breeding subspecies (L. c. sordida) nesting in coastal sage scrub and chaparral on the Channel Islands and locally in dense coastal scrub. Wintering birds from more northerly populations swell numbers considerably from October through March, when the species becomes one of the most frequently encountered warblers in gardens, parks, and brushy hillsides across the county. It’s a reliable visitor to flowering plants and hummingbird feeders, where it probes blossoms for nectar — a useful behavioral cue for locating it in winter.
4. Yellow Warbler
Few warblers announce themselves as cheerfully as the Yellow Warbler (Setophaga petechia), whose bright canary-yellow plumage and persistent “sweet-sweet-sweet-I’m-so-sweet” song make it one of the most recognizable breeding birds in San Diego’s riparian corridors. Males are almost entirely yellow with rusty-orange streaking on the breast; females are a softer, less streaked yellow-green. Both sexes have distinctive yellow tail spots — visible in flight — that immediately separate them from other yellow warblers.
Yellow Warblers breed locally along willow-dominated riparian areas throughout San Diego County, including the San Diego River, Sweetwater River, and Tijuana River Valley. They arrive on breeding grounds in April, raise one to two broods, and depart by late August. Fall migration brings additional transients through coastal sites and inland valleys from late July through September. The species is notably susceptible to Brown-headed Cowbird brood parasitism, and local conservation efforts along several San Diego riparian corridors have included cowbird trapping to protect nesting Yellow Warblers. Knowing about what birds eat to survive can help observers understand why Yellow Warblers concentrate so heavily in insect-rich willow habitats during the breeding season.
5. Yellow-rumped Warbler
The Yellow-rumped Warbler (Setophaga coronata) is, without question, the most abundant warbler in San Diego County and one of the most numerically dominant birds of any kind during the winter months. Its bright yellow rump patch — visible as a distinctive flash in flight — earned it the enduring colloquial nickname “butter butt” among birders. San Diego hosts the “Audubon’s” subspecies group (S. c. auduboni), which features a yellow throat rather than the white throat of the eastern “Myrtle” form, though both forms occur in the county.
Yellow-rumped Warblers arrive in force from October onward and can be found virtually everywhere — coastal scrub, oak woodlands, suburban parks, chaparral, and even desert-edge habitats — through April. Their ability to digest waxy berries, particularly those of wax myrtle and poison oak, allows them to winter much farther north and at higher elevations than most warblers, and San Diego’s mild winters support enormous numbers. Spring migration sends most birds north by May, but a handful of “Myrtle” type birds occasionally linger into early summer, always worth a second look for any unusual features.
Pro Tip: Learning the Yellow-rumped Warbler’s sharp “check” call is one of the most valuable skills a San Diego birder can develop — once you know it, you’ll realize just how many of these birds are moving through the canopy overhead on any given October morning.
6. Townsend’s Warbler
Townsend’s Warbler (Setophaga townsendi) is arguably San Diego’s most visually stunning regular warbler, with males sporting a bold black-and-yellow face pattern, black throat, yellow breast with black streaking, and olive-green upperparts that make them look almost tropical. Females are similar but with a yellow throat replacing the black, and softer facial markings. It’s a bird that rewards even casual glances upward in the right habitat.
In San Diego County, Townsend’s is primarily a winter visitor and migrant, arriving from October and remaining through April in coniferous and mixed woodlands, particularly in areas with large oaks, pines, and eucalyptus. Cuyamaca Rancho State Park, Palomar Mountain, and the oak woodlands of the Peninsular Ranges host good wintering numbers. During migration, the species appears more broadly across the county, including coastal sites. Townsend’s Warblers are active foragers, working the outer branches and needle clusters of conifers with quick, deliberate movements, and they frequently join mixed-species foraging flocks alongside chickadees, nuthatches, and other warblers.
7. Common Yellowthroat
The Common Yellowthroat (Geothlypis trichas) is one of North America’s most widespread warblers and a familiar resident of San Diego County’s freshwater marshes and dense riparian thickets. The male’s bold black mask bordered above by white, combined with a bright yellow throat and olive-green upperparts, makes it one of the most distinctive warblers on the continent. Females lack the mask entirely and are olive-brown above with yellow restricted to the throat and undertail coverts.
San Diego County supports both year-round resident and migratory populations of Common Yellowthroat. Breeding birds occupy cattail marshes, willow thickets, and dense streamside vegetation throughout the county, from the Tijuana River Valley to Santee Lakes and the San Diego River. Winter numbers are augmented by birds from more northerly populations. The male’s “witchety-witchety-witchety” song is one of the most distinctive sounds of San Diego’s wetland habitats, and learning it is essentially a prerequisite for productive birding at sites like the Famosa Slough or Sweetwater Marsh National Wildlife Refuge. Like the Yellow-breasted Chat, this species often responds to observer pressure by retreating deeper into marsh vegetation, making patience essential. Birders interested in water birds in California will find the Common Yellowthroat a consistent companion in wetland habitats across the state.
8. Wilson’s Warbler
Wilson’s Warbler (Cardellina pusilla) is one of San Diego County’s most reliably encountered migrants, and its combination of bright yellow plumage and the male’s distinctive black cap makes it one of the easier warblers to identify confidently in the field. Females and immature birds lack the solid black cap or show only a partial dark cap, but the overall bright yellow-olive coloration and active, flycatching foraging style remain distinctive. It’s a small, energetic bird that rarely sits still for long.
Wilson’s Warblers pass through San Diego in impressive numbers during both spring and fall migration. Spring movement peaks from late April through late May, while fall migration — which tends to be more protracted — runs from late August through October, with some birds lingering into November. During migration, the species occupies virtually any shrubby or wooded habitat, from coastal gardens and city parks to riparian corridors and mountain chaparral. A small number winter in the county, particularly in mild coastal areas. Wilson’s is frequently the most numerous warbler species at Point Loma during fall migration pushes.
9. Black-and-white Warbler
The Black-and-white Warbler (Mniotilta varia) is immediately recognizable by its bold zebra-striped plumage and its distinctive habit of creeping along tree trunks and major branches like a nuthatch — a foraging strategy unique among North American warblers that allows it to exploit bark-dwelling insects year-round. This behavior, combined with its striking plumage, makes it one of the most unmistakable warblers a San Diego birder is likely to encounter.
In San Diego County, the Black-and-white Warbler is an uncommon but annual fall migrant and rare winter visitor, occurring most frequently at Point Loma and in riparian woodlands with large trees. Fall records concentrate from September through November, and occasional wintering birds have been documented at sites with mature oaks and sycamores, including Balboa Park and Mission Trails Regional Park. Spring records are considerably rarer. This is an eastern species that reaches San Diego as a vagrant or rare migrant along the Pacific coast, so any sighting warrants careful documentation. Birders who enjoy tracking warblers in North Carolina — where this species is a common breeder — will appreciate how different the Black-and-white Warbler’s western California status is compared to its abundance in the East.
Key Insight: The Black-and-white Warbler’s nuthatch-like creeping behavior is an adaptation that lets it exploit a food source — bark-dwelling insects and larvae — largely ignored by other warblers, reducing direct competition with related species.
10. Prothonotary Warbler
The Prothonotary Warbler (Protonotaria citrea) is one of the most celebrated rarities in San Diego County birding, a gleaming golden-orange bird with blue-gray wings and a heavy bill that looks almost otherworldly when it appears against the backdrop of a California riparian corridor. Named for the golden robes worn by papal clerks called prothonotaries, this cavity-nesting warbler is primarily a bird of southeastern swamp forests, making any California record a genuinely exciting event.
San Diego records of Prothonotary Warbler are rare but occur with enough regularity — primarily in fall, from September through November — to make it worth keeping in mind when birding riparian sites with willows and cottonwoods. Point Loma, the Tijuana River Valley, and the San Diego River corridor have all produced records. When one appears, it tends to stay for several days, allowing many birders to connect with it. Any Prothonotary sighting in San Diego County should be reported promptly to local rare bird alert networks and documented with photographs.
11. Ovenbird
The Ovenbird (Seiurus aurocapilla) walks rather than hops, bobbing its body with each deliberate step through leaf litter in a manner more reminiscent of a miniature thrush than a warbler. Its orange crown stripe bordered by bold black lateral stripes, white eye ring, and heavily streaked white underparts are distinctive, though the bird’s preference for dense forest floor habitat often makes it challenging to observe well. Its loud, ringing “teacher-teacher-teacher” song is one of the most powerful sounds in eastern North American forests.
Like the Black-and-white Warbler, the Ovenbird is an eastern species that reaches San Diego as an uncommon but annual fall vagrant, with most records falling between September and November. Point Loma is by far the most reliable location for encountering one, as the dense native and ornamental plantings at Cabrillo National Monument and Collier Park concentrate migrant landbirds during fall. Ovenbirds tend to forage on or near the ground, walking slowly through leaf litter and low vegetation, which can make them surprisingly easy to observe once located despite their cryptic coloration.
12. Worm-eating Warbler
The Worm-eating Warbler (Helmitheros vermivorum) is another eastern vagrant that appears in San Diego County with low but consistent frequency, primarily during fall migration. Its buffy-orange head with four bold black stripes — two through the crown and two through the eye — combined with its plain olive-brown upperparts and buffy underparts give it a distinctive, almost sparrow-like appearance at first glance. Despite its name, it feeds primarily on caterpillars and insects rather than earthworms, often probing dead leaf clusters hanging in the understory.
San Diego records of Worm-eating Warbler are concentrated in September and October, with Point Loma again being the primary location. The species tends to forage low in dense vegetation, often in shaded areas with accumulated leaf debris, and its habit of probing hanging dead leaves is a useful behavioral field mark when trying to locate it. Any fall birder spending time at Point Loma should scan carefully through the lower vegetation layers, particularly in areas with accumulated leaf litter, as Worm-eating Warblers can be remarkably unobtrusive despite their striking head pattern.
Important Note: For all eastern vagrant warblers in San Diego — including Prothonotary, Ovenbird, Worm-eating, and several others in this guide — reporting sightings to the San Diego Field Ornithologists’ rare bird alert and submitting eBird checklists helps build the county’s understanding of vagrant patterns along the Pacific coast.
13. Louisiana Waterthrush
The Louisiana Waterthrush (Parkesia motacilla) is a large, ground-walking warbler with a strong association with fast-moving streams and creek edges — a habitat type that exists in San Diego County but is far more characteristic of the eastern United States where this species breeds. It’s a handsome bird with brown upperparts, bold white supercilium (eyebrow stripe), and heavily streaked white underparts with a distinctive buffy wash on the flanks. Its constant tail-bobbing behavior is a reliable identification cue shared with its close relative, the Northern Waterthrush.
Louisiana Waterthrush is a rare but recurring vagrant in San Diego County, with fall records from August through October being most frequent — notably earlier than most other eastern vagrant warblers, reflecting the species’ early post-breeding dispersal. It has been recorded at Point Loma and along riparian corridors with running water, where it walks deliberately along stream edges and exposed rocks. Separating Louisiana from Northern Waterthrush requires careful attention to supercilium width and color, throat streaking, and bill size — Louisiana shows a broader, whiter supercilium that flares behind the eye, a cleaner white throat, and a larger bill.
14. Northern Waterthrush
The Northern Waterthrush (Parkesia noveboracensis) is the more frequently occurring of the two waterthrush species in San Diego County, appearing as an uncommon but annual fall vagrant with occasional spring records as well. Like the Louisiana Waterthrush, it walks along the ground with persistent tail-bobbing, preferring the margins of standing or slow-moving water — ponds, flooded areas, and quiet stream backwaters — rather than the rushing streams favored by Louisiana.
Fall Northern Waterthrush records in San Diego span from August through November, with September and October being peak months. Point Loma, the Tijuana River Valley, and the edges of freshwater ponds and sloughs are the most productive locations. Key identification features distinguishing it from Louisiana Waterthrush include a narrower, yellowish-tinged supercilium of uniform width (not flaring behind the eye), streaking that extends onto the throat, and smaller overall size. Its sharp, metallic “chink” call is distinctive and often the first indication of its presence in dense waterside vegetation.
15. Golden-winged Warbler
The Golden-winged Warbler (Vermivora chrysoptera) is one of North America’s most at-risk warbler species, with breeding populations declining sharply across much of its eastern range due to habitat loss and hybridization with Blue-winged Warblers. In San Diego County, it’s a genuine rarity — a bird that generates significant excitement when it appears. Males are unmistakable: gray overall with a bold yellow crown patch, yellow wing bars, and a black throat and mask outlined in white. Females are similar but with gray replacing the black facial markings.
San Diego records of Golden-winged Warbler are rare, with most occurring during fall migration from September through November at Point Loma and occasionally at inland riparian sites. Any sighting should be carefully documented and reported. The species’ rarity in the West, combined with its striking appearance and conservation significance, makes it one of the most sought-after vagrant warblers for San Diego County listers. Birders familiar with warblers in Arizona will know that Golden-winged is similarly rare in that state, underlining just how exceptional any Pacific coast record is.
16. Blue-winged Warbler
The Blue-winged Warbler (Vermivora cyanoptera) is the Golden-winged Warbler’s closest relative and hybridization partner, and in San Diego County it shares a similar status as a rare but annual fall vagrant. Males are bright yellow overall with a narrow black line through the eye, blue-gray wings with two white wing bars, and green upperparts — a combination that makes them look almost tropical. Females are similar but with a duller yellow and less distinct facial markings.
Fall records of Blue-winged Warbler in San Diego span September through November, with Point Loma being the most consistent location. Like the Golden-winged, any sighting warrants documentation and reporting to local rare bird networks. One interesting complication for observers is the existence of hybrid forms — “Brewster’s Warbler” (the more common hybrid) and the rare “Lawrence’s Warbler” — which can appear when the two parent species hybridize. While hybrid warblers are extraordinarily unlikely in San Diego, any unusual Golden-winged or Blue-winged type warbler deserves careful scrutiny and photographic documentation.
17. Blackpoll Warbler
The Blackpoll Warbler (Setophaga striata) undertakes one of the most extraordinary migrations of any North American songbird, flying non-stop over the Atlantic Ocean from the northeastern United States to South America in fall — a journey of up to 2,500 miles over open water. The fact that a small number of these birds end up on the Pacific coast of California each fall is a testament to how dramatically weather events can redirect migrating birds. In San Diego County, Blackpoll is an uncommon but annual fall vagrant.
Fall Blackpoll Warblers in San Diego present in their drab non-breeding plumage — olive-green above with faint streaking, yellowish below, and distinctive pale legs with yellow-orange feet — rather than the bold black cap and white cheek of breeding males. This plumage can be confusing, and careful attention to the pale legs, streaked back, and two white wing bars is essential for confident identification. Records concentrate from September through November at Point Loma and coastal sites. The species is considerably rarer in spring in San Diego, as northbound birds take a more inland route through the interior of the continent.
Pro Tip: When searching for Blackpoll Warblers at Point Loma in fall, pay attention to the pale yellowish-orange feet — a feature visible even on briefly seen birds that immediately narrows the identification to Blackpoll or Bay-breasted Warbler, both rare fall vagrants in San Diego.
18. Canada Warbler
The Canada Warbler (Cardellina canadensis) is a bird of cool, moist northern forests during the breeding season, and its appearance in San Diego County as a fall vagrant always draws attention from local birders. Males are among the most elegantly patterned warblers in North America: blue-gray above, bright yellow below, with a distinctive “necklace” of black streaks across the breast and a bold yellow eye ring. Females and immatures show a similar but less contrasting pattern, with the necklace reduced to faint streaking.
Canada Warbler records in San Diego are rare but occur with enough regularity — primarily in September and October — to make it worth watching for at Point Loma and in dense riparian vegetation elsewhere in the county. The species tends to forage actively in the mid-story and lower canopy, often flycatching for insects with quick sallies. Its bold facial pattern and yellow eye ring are usually sufficient for identification even on brief views. Like most eastern vagrant warblers reaching San Diego, Canada Warblers typically stay for several days once they settle in suitable habitat, giving multiple birders the opportunity to connect.
19. Black-throated Blue Warbler
The Black-throated Blue Warbler (Setophaga caerulescens) presents one of the most striking cases of sexual dimorphism among North American warblers — males and females look so different that early ornithologists classified them as separate species. Males are deep blue above with a black face, throat, and flanks, and white underparts, with a distinctive white wing spot. Females are olive-brown above with a pale supercilium and buffy underparts, but they retain the small white wing spot that is the key identification feature regardless of age or sex.
In San Diego County, Black-throated Blue Warbler is a rare but annual fall vagrant, with most records from September through November at Point Loma and occasionally at inland sites with dense vegetation. The white wing spot — visible even on briefly glimpsed females — is the most reliable field mark and should be the first feature checked on any olive-brown, unstreaked warbler with a pale eyebrow. Spring records are considerably rarer. This is a species that rewards careful searching of the mid-story in areas with dense shrub cover, as it tends to forage lower than many other warblers.
20. Nashville Warbler
The Nashville Warbler (Leiothlypis ruficapilla) is a small, compact warbler with a distinctive combination of gray head, bold white eye ring, olive-green back, and entirely yellow underparts — a clean, crisp pattern that makes it one of the easier western warblers to identify confidently. Males have a partially concealed chestnut crown patch that is rarely visible in the field. The species also has a distinctive habit of frequently bobbing its tail, a behavioral cue that can help locate it in dense vegetation.
Nashville Warbler is a regular spring and fall migrant through San Diego County, with the western subspecies (L. r. ridgwayi) passing through in both seasons. Spring migration peaks from late April through May, while fall movement spans August through October. During migration, the species occupies a wide variety of shrubby and wooded habitats, from coastal sage scrub and riparian corridors to mountain chaparral. A small number winter in the county, particularly in mild coastal areas with dense shrub cover. Nashville Warbler is one of the more frequently encountered migrant warblers at Point Loma and at inland riparian sites like Mission Trails Regional Park.
21. Hermit Warbler (Rare/Migrant)
The Hermit Warbler (Setophaga occidentalis) is a bird of the tall coniferous forests of the Pacific coast mountain ranges, breeding in the Sierra Nevada and Cascades and wintering primarily in Mexico and Central America. Males are stunning birds — bright yellow head, black throat, gray back with white wing bars, and white underparts — while females show a similar but more subdued pattern with a yellow-olive head and less distinct black on the throat. It’s a bird that spends much of its time foraging high in the canopy of Douglas firs and other conifers, making observation challenging.
In San Diego County, Hermit Warbler is considered a rare migrant and occasional winter visitor rather than a common transient, with records concentrated in coniferous habitats on Palomar Mountain, Cuyamaca Rancho State Park, and the higher elevations of the Peninsular Ranges. Fall migrants occasionally appear at lower elevations and coastal sites during migration. The species is also known to hybridize with Townsend’s Warbler where their ranges overlap, producing intermediate birds that can complicate identification — any warbler showing mixed Hermit and Townsend’s characters in San Diego County warrants careful documentation. Birders interested in the broader diversity of warbler species found across North America will find the Hermit Warbler a fascinating example of Pacific coast avian specialization.
Key Insight: Hermit Warbler and Townsend’s Warbler hybridize along a contact zone in the Pacific Northwest, and the resulting hybrids show a fascinating gradient of intermediate features. Any Hermit-type warbler in San Diego with a greenish tinge to the back or partial dark markings on the head is worth photographing carefully.
22. Black-throated Gray Warbler (Rare)
The Black-throated Gray Warbler (Setophaga nigrescens) is the one warbler on this list that could reasonably be described as a western specialty — it breeds in oak and pinyon-juniper woodlands throughout the interior West and winters primarily in Mexico, making it part of a genuinely western warbler community.
Males are crisp black-and-white birds with a black throat, black and white head pattern, gray upperparts, and a tiny but distinctive yellow spot in front of the eye. Females are similar but with a white throat and less black on the head.
Despite being a western species, Black-throated Gray Warbler is listed here as rare in San Diego County because, while it does occur as a migrant and occasional winter visitor in appropriate oak woodland habitat, it is less common and less consistently encountered than its status in neighboring counties or regions might suggest.
Breeding occurs in the mountains of San Diego County — particularly in oak-dominated habitats on Palomar Mountain and in the Cuyamaca area — but confirmed breeding records are relatively sparse compared to more northern California counties.
During migration, the species appears in a variety of wooded habitats, and fall migrants occasionally turn up at coastal sites. Winter records come primarily from oak woodlands in the foothills. Birders exploring California’s diverse avifauna more broadly will find the Black-throated Gray Warbler a satisfying representative of the state’s distinctive western bird community.
