Phalaenoptilus nuttallii
Silhouette: Sheatherius · PhyloPic
In 3 days ~10%
The common poorwill (Phalaenoptilus nuttallii) is a nocturnal bird of the family Caprimulgidae, the nightjars. It is found from British Columbia and southeastern Alberta, through the western United States to northern Mexico. The bird's habitat is dry, open areas with grasses or shrubs, and even stony desert slopes with very little vegetation.
Many northern birds migrate to winter within the breeding range in central and western Mexico, though some remain further north. The common poorwill is the only bird known to go into torpor for extended periods (weeks to months). This happens on the southern edge of its range in the United States, where it spends much of the winter inactive, concealed in piles of rocks. Such an extended period of torpor is close to a state of hibernation and is not known among other birds.
The common poorwill was illustrated and formally described in 1844 by the ornithologist John James Audubon from a male specimen collected on the eastern bank of the Missouri River between Fort Pierre and mouth of the Cheyenne River in South Dakota. Audubon coined the binomial name Caprimulgus nuttallii, choosing the specific epithet to honour a friend, the ornithologist... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Guadalupe Mountains National Park | 🇺🇸 United States | |
| 2 | Big Bend National Park | 🇺🇸 United States | |
| 3 | Death Valley National Park | 🇺🇸 United States | |
| 4 | Saguaro National Park | 🇺🇸 United States | |
| 5 | Cumbres de Monterrey National Park | 🇲🇽 Mexico | |
| 6 | Joshua Tree National Park | 🇺🇸 United States | |
| 7 | Badlands National Park | 🇺🇸 United States | |
| 8 | El Vizcaíno Biosphere Reserve | 🇲🇽 Mexico | |
| 9 | Zion National Park | 🇺🇸 United States | |
| 10 | Grand Canyon National Park | 🇺🇸 United States | |
| 11 | Yosemite National Park | 🇺🇸 United States | |
| 12 | Channel Islands National Park | 🇺🇸 United States | |
| 13 | Rocky Mountain National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | San Diego | 🇺🇸 United States | |
| 2 | Las Vegas | 🇺🇸 United States | |
| 3 | Los Angeles | 🇺🇸 United States | |
| 4 | Denver | 🇺🇸 United States | |
| 5 | Mesa | 🇺🇸 United States | |
| 6 | Portland | 🇺🇸 United States | |
| 7 | Salt Lake City | 🇺🇸 United States | |
| 8 | Seattle | 🇺🇸 United States | |
| 9 | Phoenix | 🇺🇸 United States | |
| 10 | San Francisco | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Common Poorwill sighting in Saguaro National Park on a given day, based on 293 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 103rd most-seen of the 220 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
August
In that month about 10% of wildlife watchers report a Common Poorwill in Saguaro National Park on a given day, against under 5% in September to July, the lowest months. That is one of Saguaro National Park's wettest months, with about 45 mm of rain against almost none in May.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Common Poorwill sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
4th of 13
Of the 13 parks where we can rate Common Poorwill sightings, Saguaro National Park ranks 4th at under 5%. The best odds are in Guadalupe Mountains National Park (United States, about 10%), Big Bend National Park (United States, about 10%) and Death Valley National Park (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Common Poorwill is recorded against all the birds logged in Saguaro National Park (293 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.
