August 24, 2016 – Mountain Bluebird (Sialia currucoides)

These bluebirds range from Alaska to parts of Mexico across the western half of North America. They eat mainly insects and other invertebrates, along with some small fruits and seeds in winter. Females choose mates based on the quality of the nesting sites they select, rather than for their songs, displays, or appearance. They build the nests in tree cavities or artificial nest boxes, lining them with soft plants, wool, or feathers and incubate the eggs while the males feed them. Males will sometimes mimic the females’ nest building, flying to the nesting site as if bringing materials, but either carrying nothing or dropping the material before reaching the nest. Both parents feed the chicks.


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