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Bird Bio - Mountain Bluebird

Common Name:

Mountain Bluebird.

Scientific Name:

Sialia currucoides


  • Belongs to Thrush Subfamily
  • Largest Bluebird
  • Male- sky blue, lighter blue
  • Female- uniform pale-grayish brown body; sky blue wings and tail


  • Egg description: pale blue or whitish
  • Nest description: Cup shaped, Made of grasses, shreds of sage, aspen bark, twigs, feathers, pine needles
  • # Eggs: 4-8, one pale blue or whitish egg laid per day
  • Length of Incubation: 13-14 days
  • Fledging Age: 18 to 23 days
  • Broods/season: 1 at higher elevations, 2 at lower elevations
  • Longevity of Adult: 5 years


  • Open country with scattered trees
  • Nest in plains to timberline
  • Grasslands, sagebrush flats
  • Forest edges
  • Edges of alpine tundra (up to 12350 ft)
  • Territories can be upward of 12 acres
  • Will use man-made nests and visit feeders


  • Ground feeders – will hover while searching
  • Primarily insects
  • Will eat fruit, berries and seeds

Other Facts:

  • Will return to successful breeding territory, starts in late winter early spring
  • Will collect in groups late in summer
  • Most migratory of the 3 species
  • Will winter as far south as central Mexico


  • Coppers Hawk
  • Sharped-Shined Hawk
  • Northern Harrier
  • American Kestrels
  • House Sparrow
  • American Crows
  • Weasels
  • Chipmunks
  • Squirrels
  • Blowflies
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