TRUEBRIT, I'm betting you meant 'drifts of bluebells', as 'drifts of bluebirds' would be a mite dismal, given they are usually airborne or chirpin' on twigs. ;-)

Fields of buebells are indeed lovely, but I'll raise you a riverbank covered in trout Lilies and Bluets, or an upland field of blooming pink Rhodora.