Tyrannus vociferans
Silhouette: Andy Wilson · PhyloPic
In 3 days <5% in a week ~10%
Cassin's kingbird (Tyrannus vociferans) is a large tyrant flycatcher native to western North America. The name of this bird commemorates the American ornithologist John Cassin. Cassin's kingbird was formally described in 1826 by English naturalist William Swainson under the current binomial name Tyrannus vociferans. The type locality is Temascaltepec, Mexico. The specific epithet vociferans is Latin for "shouting".
Two subspecies are recognised: They have a pale throat and deep yellow lower breast. Juveniles are duller and have pale edges on their wings. Measurements: Length: 8.3–9.1 in (21–23 cm) Weight: 1.6 oz (45 g) Wingspan: 41 cm Cassin's kingbird and the western kingbird are similar in appearance. Cassin's is a little larger than the western and the upper parts are a darker gray than the western. The most distinctive difference between these birds is that the Cassin's has a thin white edge... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Reserva de la Biosfera Mariposa Monarca | 🇲🇽 Mexico | |
| 2 | Cabo Pulmo National Park | 🇲🇽 Mexico | |
| 3 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 4 | Bahía de Loreto National Park | 🇲🇽 Mexico | |
| 5 | Big Bend National Park | 🇺🇸 United States | |
| 6 | Saguaro National Park | 🇺🇸 United States | |
| 7 | Zion National Park | 🇺🇸 United States | |
| 8 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 9 | El Vizcaíno Biosphere Reserve | 🇲🇽 Mexico | |
| 10 | Channel Islands National Park | 🇺🇸 United States | |
| 11 | Grand Canyon National Park | 🇺🇸 United States | |
| 12 | Cañón del Sumidero National Park | 🇲🇽 Mexico | |
| 13 | Joshua Tree National Park | 🇺🇸 United States | |
| 14 | Point Pelee National Park | 🇨🇦 Canada | |
| 15 | Everglades National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | León | 🇲🇽 México | |
| 2 | Puebla | 🇲🇽 México | |
| 3 | Mexico City | 🇲🇽 México | |
| 4 | Toluca | 🇲🇽 México | |
| 5 | San Diego | 🇺🇸 United States | |
| 6 | Los Angeles | 🇺🇸 United States | |
| 7 | Guadalajara | 🇲🇽 México | |
| 8 | Tijuana | 🇲🇽 México | |
| 9 | Torreón | 🇲🇽 México | |
| 10 | San Luis Potosí | 🇲🇽 México |
Rare
Under 5% of wildlife watchers report a Cassin's Kingbird sighting in Grand Canyon National Park on a given day, based on 29 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 132nd most-seen of the 194 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Cassin's Kingbird in Grand Canyon National Park on a given day, so our monthly data shows no clear season.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Cassin's Kingbird sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
11th of 15
Of the 15 parks where we can rate Cassin's Kingbird sightings, Grand Canyon National Park ranks 11th at under 5%. The best odds are in Reserva de la Biosfera Mariposa Monarca (Mexico, about 20%), Cabo Pulmo National Park (Mexico, about 20%) and Guadalupe Mountains National Park (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Cassin's Kingbird is recorded against all the birds logged in Grand Canyon National Park (29 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.
