Eastern Bluebirds Using Open Cup Nests

In May 2017, Jason Estep of Ohio witnessed something incredibly rare, or at least, rarely seen. An Eastern Bluebird female consistently sat in the old nest of an American Robin over an eight day period. Although the nest was too high to glimpse the contents, it is thought that she was incubating eggs. But Jason isn’t the only one to find this kind of oddity this year.