Here’s one of every birdwatchers’ and birdfeeders’ favourites. And this is how much: in the 1960’s and 70’s, the population of these blue flyers went down 90% (!) due to harsh nesting competition between them and their rivals, the starlings and house sparrows.
Mountain Bluebirds — Nesting Time!
Meet the 96-Year-Old Man Who Turned Southern Idaho Into a Bluebird Haven
eastern bluebird Best Life Birding- Birdwatching Tours
One of my new favorite birds that I've never seen before! Eastern Bluebird! : r/birding
BIRD OF THE WEEK: THE EASTERN BLUEBIRD – Nature Anywhere
Cornell Ag Connection: Bluebirds are returning to the North Country, Opinion
Bob's Nature Note: Eastern Bluebirds - Friends of Warner Parks
Wild Bird Feature: All About the Eastern Bluebird – Valley Farms Shop
Bluebirds in a New England winter — not that uncommon
12 Birds and 6 Resolutions: Mid-year Reflections, by Randy Runtsch, Wildlife Trekker
Bluebird Facts – South Carolina Bluebird Society