Eastern Bluebird, a welcome sight on a snowy day! Eastern Bluebird populations plunged in the early 20th century, when non-native House Sparrows and European Starlings were introduced into the United States. Both of these invasive species are also cavity-nesters and much more aggressive than bluebirds, so they quickly took over suitable nest cavities and habitats. Fortunately, concerned citizens stepped in to halt bluebird declines. Organizations such as the North American Bluebird Society and Sialis have been instrumental in encouraging bluebird conservation through education, promotion of artificial nest boxes, and establishment of bluebird nest box trails, which are protected and monitored by a network of volunteers. (Photo by Tony Campbell) #easternbluebird #bluebirdsofinstagram #bluebirds #bluebirdofhappiness #bluebird #birdphoto #birdphotography #naturephotography #birdsofinstagram #sialissialis #sialis #nature #birds #birdconservation #americanbirdconservancy #bluebirdsociety
