Mountain Bluebirds in Arizona

Mountain Bluebirds live in Arizona all year. Low deserts stay mild and host many wintering sparrows and hummingbirds; the high country gets snow. That makes the cold months the time your yard matters most to them: their winter diet shifts toward juniper berries.

Hot Sonoran and Mojave deserts in the south and west, with pine-oak sky islands and the Colorado Plateau rising above 7,000 ft.

Across Arizona, mountain bluebirds typically nest from April–July. Nest site: cavity or nest box. Females lay 4–8 eggs, incubate for 13–14 days, and young leave the nest after 17–21 days.

Summer highs above 110°F in Phoenix and Tucson make water the single strongest attractant; the July monsoon triggers a second breeding pulse.

• Have boxes cleaned and mounted before March — mountain bluebirds begin prospecting ahead of egg-laying.
• Use a 1 9/16 in entrance on a 5 × 5 in floor, mounted 5–10 ft.
• Fit a pole baffle or hole guard; ventilation gaps and drainage holes are essential.
• Clean out old nests after each brood and again after July.

Of the regional native plants we track for Arizona, these 8 provide food or cover mountain bluebirds use:

Nests at high elevations in open country; takes nest boxes on fence lines.

• Best foods: Mealworms.
• In Arizona's winter: Low deserts stay mild and host many wintering sparrows and hummingbirds; the high country gets snow.

Full diet breakdown for mountain bluebirds · Best feeder for mountain bluebirds