Elf Owl

The Elf Owl holds the distinction of being the smallest owl in the world, weighing little more than a few coins and small enough to fit in a human palm. It has a rounded head without ear tufts, bright yellow eyes, and a short tail, with grayish-brown plumage mottled and streaked to blend with desert vegetation and bark.

Despite its diminutive size, this owl is a bold and vocal presence on warm desert nights, especially in the saguaro cactus deserts of the American Southwest where its calls are a signature sound of the summer evening chorus.

Its extreme dependence on cavities excavated by woodpeckers, particularly Gila Woodpeckers in saguaros, makes it a compelling example of how one species' engineering creates essential habitat for another.

Key Field Marks

• Extremely tiny size, smaller than a sparrow
• Short tail, no ear tufts, yellow eyes
• Grayish-brown mottled plumage with faint white spotting
• Often heard giving a rapid, chattering call from cactus or tree cavities at night

Similar Species

• Northern Pygmy-Owl is larger, has a longer tail, and lacks the Elf Owl's tiny stature and desert-cactus habitat.
• Western Screech-Owl is considerably larger with visible ear tufts.
• Voice and extremely small size are the best clues in overlapping desert range.

Elf Owls breed primarily in the Sonoran and Chihuahuan Desert regions of the southwestern United States and Mexico, especially areas with saguaro cactus, as well as riparian cottonwood woodlands and oak-pine canyons at somewhat higher elevations. They range from southern Arizona, New Mexico, and Texas south through much of Mexico.

Most North American populations are migratory, arriving in spring and withdrawing to Mexico for the winter, making them absent from desert habitats during the colder months.

Behavior

Strictly nocturnal, Elf Owls emerge shortly after dusk to hunt and are highly vocal on warm nights, particularly during the breeding season. They roost by day hidden in cavities or dense vegetation.

Voice

The call is a rapid, high-pitched chattering series of yips and chirps, quite different from the hoots of larger owls, often described as puppy-like yapping.

Feeding

Elf Owls feed almost entirely on arthropods - moths, beetles, crickets, scorpions, and spiders - captured in short sallying flights from a perch, often around desert lights that attract insects.

Nesting & Breeding

This species nests exclusively in pre-existing cavities, most famously old Gila Woodpecker or Gilded Flicker holes in saguaro cacti, as well as cavities in trees. Clutches typically contain 2-4 eggs, and the tiny owls are entirely dependent on woodpecker excavation since they cannot create their own cavities.