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.
Out My Backdoor: Bluebird Nesting – A True-life Drama
BIRD OF THE WEEK: THE EASTERN BLUEBIRD – Nature Anywhere
Western Bluebirds
Bluebirds are returning to the North Country News, Sports, Jobs - Adirondack Daily Enterprise
bluebird feeder — Bird News — The Wood Thrush Shop
Flyers - LITTLE BIRD, garoando conceito
Eastern Bluebird Overview, All About Birds, Cornell Lab of Ornithology
Flyers - LITTLE BIRD, garoando conceito
BIRD OF THE WEEK: THE EASTERN BLUEBIRD – Nature Anywhere