Regulus calendula
Silhouette: Ferran Sayol · PhyloPic
In 3 days ~80% in a week >90%
The ruby-crowned kinglet (Corthylio calendula) is a very small passerine bird found throughout North America. It is a member of the kinglet family. The bird has olive-green plumage with two white wing bars and a white eye-ring. Males have a red crown patch, which is often concealed. The sexes are identical apart from the crown, and juveniles are similar in plumage to adult females. It is one of the smallest songbirds in North America. The ruby-crowned kinglet is not closely related to other kinglets and was moved from Regulus to its own genus, Corthylio, in 2021. Three subspecies are currently recognized.
The kinglet is mostly migratory, and its range extends from northwest Canada and Alaska south to Mexico. Its breeding habitat is spruce-fir forests in the northern and mountainous regions of the United States and Canada. The ruby-crowned kinglet builds a cup-shaped nest, which may be pensile or placed on a tree branch and is often hidden. It lays up to 12 eggs, and has the largest clutch of any North American passerine for its size. It is mainly insectivorous, but also eats fruits and seeds.
The ruby-crowned kinglet was formally described in 1766 by the Swedish naturalist... Wikipedia →
Recording0:04
United States · 2025
© zhen (he/him) · iNaturalist · CC BY-NC 4.0
Recording0:13
United States · 2024
© Sue Brady · iNaturalist · CC BY-NC 4.0
Recording0:07
Canada · 2023
© danielalain · iNaturalist · CC BY-NC 4.0
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Toluca | 🇲🇽 México | |
| 2 | San Antonio | 🇺🇸 United States | |
| 3 | Austin | 🇺🇸 United States | |
| 4 | Mexico City | 🇲🇽 México | |
| 5 | Sacramento | 🇺🇸 United States | |
| 6 | Houston | 🇺🇸 United States | |
| 7 | Puebla | 🇲🇽 México | |
| 8 | Mesa | 🇺🇸 United States | |
| 9 | Monterrey | 🇲🇽 México | |
| 10 | Seattle | 🇺🇸 United States |
Likely
About 40% of wildlife watchers report a Ruby-crowned Kinglet sighting in Toluca on a given day, based on 72 verified sightings from GBIF citizen-science data. It is the 17th most-seen of the 118 birds we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
February and March
In those months about 60% of wildlife watchers report a Ruby-crowned Kinglet in Toluca on a given day, against about 10% in September, the lowest month. Those are among Toluca's driest months, with about 15 mm of rain a month against 150 mm in July.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Ruby-crowned Kinglet sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 40 cities where we can rate Ruby-crowned Kinglet sightings, Toluca has the highest daily chance: about 40%. Next come San Antonio (United States, about 40%) and Austin (United States, about 30%).
Same order: Passeriformes
The closest relatives of the Ruby-crowned Kinglet that you can see in Toluca (order Passeriformes, Perching Birds) are House Finch (about 80%), Canyon Towhee (about 80%) and Bushtit (about 70%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Ruby-crowned Kinglet is recorded against all the birds logged in Toluca (72 verified sightings), 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.
