Sialia sialis
Silhouette: Andy Wilson · PhyloPic
In 3 days ~60% in a week ~90%
The eastern bluebird (Sialia sialis) is a small North American migratory thrush found in open woodlands, farmlands, and orchards. The bright-blue breeding plumage of the male, easily observed on a wire or open perch, makes this species a favorite of birders. The male's call includes sometimes soft warbles of jeew or chir-wi, or the melodious song chiti WEEW wewidoo.
It is the state bird of Missouri and New York. The eastern bluebird was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Motacilla sialis. The type location is South Carolina. Linnaeus based his short Latin description on the earlier more detailed descriptions by the English naturalists Mark Catesby and George Edwards. The eastern bluebird is now placed in the genus Sialia that was introduced by the English naturalist William Swainson in 1827 with the eastern bluebird as the type species.
Seven subspecies are recognized: S. s... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States | |
| 3 | Congaree National Park | 🇺🇸 United States | |
| 4 | Reserva de la Biosfera Mariposa Monarca | 🇲🇽 Mexico | |
| 5 | Celaque National Park | 🇭🇳 Honduras | |
| 6 | Celestún Biosphere Reserve | 🇲🇽 Mexico | |
| 7 | El Triunfo | 🇲🇽 Mexico | |
| 8 | Point Pelee National Park | 🇨🇦 Canada | |
| 9 | Acadia National Park | 🇺🇸 United States | |
| 10 | La Tigra National Park | 🇭🇳 Honduras | |
| 11 | Big Cypress National Preserve | 🇺🇸 United States | |
| 12 | Big Bend National Park | 🇺🇸 United States | |
| 13 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 14 | Badlands National Park | 🇺🇸 United States | |
| 15 | Merritt Island National Wildlife Refuge | 🇺🇸 United States | |
| 16 | Cerro Azul Meámbar National Park | 🇭🇳 Honduras | |
| 17 | Cumbres de Monterrey National Park | 🇲🇽 Mexico |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Washington | 🇺🇸 United States | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | Houston | 🇺🇸 United States | |
| 4 | Orlando | 🇺🇸 United States | |
| 5 | Baltimore | 🇺🇸 United States | |
| 6 | Austin | 🇺🇸 United States | |
| 7 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 8 | Montreal | 🇨🇦 Canada | |
| 9 | Philadelphia | 🇺🇸 United States | |
| 10 | Guatemala City | 🇬🇹 Guatemala |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Columbus Zoo and Aquarium | 🇺🇸 United States | |
| 2 | Montreal Biodome | 🇨🇦 Canada |
Possible
About 30% of wildlife watchers report an Eastern Bluebird sighting in Congaree National Park on a given day, based on 404 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 33rd most-seen of the 148 birds we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
February
In that month about 50% of wildlife watchers report an Eastern Bluebird in Congaree National Park on a given day, against about 20% in April–June and August–September, the lowest months.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Eastern Bluebird sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 17
Of the 17 parks where we can rate Eastern Bluebird sightings, Congaree National Park ranks 3rd at about 30%. The best odds are in Shenandoah National Park (United States, about 40%) and Great Smoky Mountains National Park (United States, about 40%). All parks ranked.
Same family: Turdidae
The closest relatives of the Eastern Bluebird that you can see in Congaree National Park (family Turdidae, Thrushes) are Hermit Thrush (about 30%), American Robin (about 30%) and Wood Thrush (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Eastern Bluebird is recorded against all the birds logged in Congaree National Park (404 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
