Arizona’s desert and forest habitats host a fascinating variety of nocturnal birds of prey, each with distinctive calls that echo through the night. This list covers 10 of the most notable species found in the state, perfect for birdwatchers, naturalists, and anyone curious about the mysterious sounds that fill the southwestern night skies.
Great Horned Owl (Bubo virginianus)
The Great Horned Owl is one of the most widespread and recognizable owls in Arizona. Its deep, resonant hoots—usually a series of five to eight spaced notes—are often described as “hoo-h’HOO-hoo-hoo.” This powerful raptor is valued for its adaptability and haunting call that signals its presence across deserts, woodlands, and urban edges.
Western Screech-Owl (Megascops kennicottii)
Smaller than the Great Horned Owl, the Western Screech-Owl has a distinctive series of short, accelerating whistles that sound like a bouncing ball. These trills and whistles are often heard near wooded riparian areas and residential neighborhoods. Its call helps birders identify it despite its small size and excellent camouflage.
Elf Owl (Micrathene whitneyi)
The Elf Owl is the tiniest owl in Arizona and the world’s smallest owl species, measuring about 5 to 6 inches tall. It produces a high-pitched, short “pseep” or “whinny” call, often repeated in rapid succession. Found primarily in desert habitats, it nests in woodpecker cavities and feeds on insects, making its delicate call a unique soundscape feature.
Barn Owl (Tyto alba)
Known for its heart-shaped face, the Barn Owl’s eerie, raspy screech is unlike the hoots of other owls. This long, drawn-out shriek is often heard in open grasslands and agricultural areas of Arizona. The call’s chilling quality has inspired folklore and makes the Barn Owl’s presence unmistakable at night.
Burrowing Owl (Athene cunicularia)
Unlike other nocturnal raptors, the Burrowing Owl is often active during dusk and dawn but still considered crepuscular and nocturnal in some activity. Its call is a series of short, sharp “coo-coo” or “kweek-kweek” sounds, sometimes repeated rapidly. It nests underground in burrows, often in open desert or grassland, making its vocalizations essential for locating it in open terrain.
Long-eared Owl (Asio otus)
The Long-eared Owl has a distinctive call consisting of low, rhythmic hoots that sound like “hoo-hoo-hoo-hoo.” This species favors dense forests and wooded canyons in Arizona. Its vocalizations are often used by researchers to detect its presence during breeding season, as the owl is otherwise secretive and well-camouflaged.
Flammulated Owl (Psiloscops flammeolus)
The Flammulated Owl is a small, migratory species that winters in Mexico but breeds in Arizona’s montane forests. It emits a soft, single-note hoot repeated at regular intervals, described as a “poo” or “whoo” call. Its subtle sound is treasured by birders during spring and early summer nights in pine forests.
Spotted Owl (Strix occidentalis)
Arizona is home to the Mexican subspecies of the Spotted Owl, which inhabits mature pine and mixed conifer forests. Its call is a series of hoots and whistles that can carry for long distances, often described as “hoo-hoo hoo hoo hoo.” The Spotted Owl is a conservation icon, and hearing its call is a rare treat for naturalists exploring remote forested areas.
Flammulated Screech-Owl (Megascops flammeolus)
Often confused with the Western Screech-Owl, the Flammulated Screech-Owl has a quieter, more subtle call consisting of soft, rhythmic hoots and whistles. It prefers higher elevation pine forests and is less commonly heard than its Western counterpart. Its call’s haunting quality adds to the mystique of Arizona’s nighttime forest sounds.
Common Poorwill (Phalaenoptilus nuttallii)
While not a raptor, the Common Poorwill is a nocturnal bird often associated with night sounds in Arizona’s deserts. Its repetitive, whistled “poor-will” call is a distinctive and evocative soundscape element. This bird’s ability to enter torpor during cold periods also makes it unique among night birds in the region.
How to Choose
When identifying or focusing on nocturnal birds of prey in Arizona, the key factors are habitat, call type, and time of year. Great Horned Owls and Barn Owls are widespread and easier to find, while species like the Flammulated Owl or Spotted Owl require specific forested habitats and seasons. Listening carefully to the pitch, rhythm, and tone of calls can help differentiate species. Additionally, consider the environment: desert, riparian, or montane forest, as many owls have habitat preferences that guide where to listen.
Frequently Asked Questions
Q: When is the best time to hear nocturnal birds of prey in Arizona?
Most owls are active from dusk through dawn, with peak vocal activity often occurring just after sunset or before sunrise.
Q: Are all owls in Arizona strictly nocturnal?
No, some like the Burrowing Owl are more crepuscular, active during dawn and dusk, but many are strictly nocturnal hunters.
Q: How can I distinguish owl calls from other night sounds?
Owl calls tend to be hoots, screeches, whistles, or trills with specific rhythms and tones, unlike insect or frog calls which are more repetitive or buzzing.
Q: Do these nocturnal birds migrate?
Some species, like the Flammulated Owl, are migratory, breeding in Arizona during warmer months and wintering further south.
Q: Can I attract nocturnal birds of prey to my backyard?
Providing natural habitat, perches, and limiting light pollution can help, but these birds are wild and best appreciated from a respectful distance.
Final Thoughts
Arizona’s nocturnal birds of prey form a vital and enchanting part of the night ecosystem, their calls offering clues to their hidden lives. Whether you’re a seasoned birder or a curious nature lover, learning to recognize these species by their calls can deepen your connection to the desert and forest nights. With patience and attentive listening, the haunting hoots and whistles of Arizona’s owls will become familiar companions under the stars.
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