Campylorhynchus brunneicapillus
Silhouette: Andy Wilson · PhyloPic
In 3 days ~50% in a week ~80%
The cactus wren (Campylorhynchus brunneicapillus) is a species of wren that is endemic to the deserts of the southwestern United States and northern and central Mexico. It is the state bird of Arizona, and the largest wren in the United States. Its plumage is brown, with black and white spots as markings. It has a distinctive white eyebrow that sweeps to the nape of the neck. The chest is white, whereas the underparts are cinnamon-buff colored. Both sexes appear similar. The tail, as well as flight feathers, are barred in black and white. Their song is a loud raspy chirrup; akin in the description of some ornithologists to the sound of a car engine that will not start. It is well-adapted to its native desert environment, and the birds can meet their water needs from their diet which consists chiefly of insects, but also of some plant matter. The cactus wren is a poor flier and generally forages for food on the ground. Ornithologists generally recognize seven subspecies, with the exact taxonomy under dispute.
Its common name derives from their frequenting desert cactus plants such as the saguaro and cholla, building nests, roosting, and seeking protection from predators among them. Its bulky and globular nests are constructed of plant material and lined with feathers. They do not migrate; instead, they establish and defend the territories around their nests where they live all year-round. It lives in pairs, or as family groups from late spring through winter. Pairing among cactus wrens is monogamous; in each breeding season, the males chiefly build nests, the females incubate eggs, and both parents feed the young.
Populations have declined as the species faces threats related to human activities and habitat loss, although the species remains abundant. Habitat fragmentation and fire have been of particular concern, as the cactus wren is slow to disperse into new habitats. Introduced species have also hurt populations. Feral cats hunt many birds in urban settings, and invasive grasses take up valuable foraging space, reducing habitat size. Despite these threats, the cactus wren has proved adaptable. Cactus wrens have learned to coexist with humans effectively, using human materials and structures for nesting, and even learning to take insects from vehicle radiator grilles. The population still numbers in the millions, leading the International Union for Conservation of Nature to consider the cactus wren a species of least concern. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States | |
| 2 | Cabo Pulmo National Park | 🇲🇽 Mexico | |
| 3 | Big Bend National Park | 🇺🇸 United States | |
| 4 | Joshua Tree National Park | 🇺🇸 United States | |
| 5 | Bahía de Loreto National Park | 🇲🇽 Mexico | |
| 6 | El Vizcaíno Biosphere Reserve | 🇲🇽 Mexico | |
| 7 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 8 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 9 | Death Valley National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Phoenix | 🇺🇸 United States | |
| 2 | Mesa | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States | |
| 4 | Mexico City | 🇲🇽 México | |
| 5 | San Diego | 🇺🇸 United States |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Arizona-Sonora Desert Museum | 🇺🇸 United States | |
| 2 | Ralph Perkins II Wildlife Center and Woods Garden | 🇺🇸 United States |
Possible
About 20% of wildlife watchers report a Cactus Wren sighting in El Vizcaíno Biosphere Reserve on a given day, based on 374 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 46th most-seen of the 237 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
March
In that month about 40% of wildlife watchers report a Cactus Wren in El Vizcaíno Biosphere Reserve on a given day, against about 10% in November to January, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Cactus Wren sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
6th of 9
Of the 9 parks where we can rate Cactus Wren sightings, El Vizcaíno Biosphere Reserve ranks 6th at about 20%. The best odds are in Saguaro National Park (United States, about 70%), Cabo Pulmo National Park (Mexico, about 60%) and Big Bend National Park (United States, about 50%). All parks ranked.
Same family: Troglodytidae
The closest relatives of the Cactus Wren that you can see in El Vizcaíno Biosphere Reserve (family Troglodytidae, Wrens) are Marsh Wren (about 10%) and House Wren (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Cactus Wren is recorded against all the birds logged in El Vizcaíno Biosphere Reserve (374 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.
