Ultimate Bluebird House Thanks to the vigilance and devotion of wild bird lovers that have begun to offer Bluebird Nesting Boxes, the Eastern Bluebird is making a comeback all the way into Canada. This bird had dangerously dwindled in numbers, displaced with aggressive introduced species, the usual house sparrows and European Starlings. The bluebird house we recommend opens on one side for cleaning, and on the other side for observation (the wood door opens to a plexiglas window) to monitor the health of the baby birds with minimal impact. If you are succesful in attracting bluebirds to nest, why not give them extra help during breeding season with a Mealworm Feeder? This feeder requires the birds to enter or exit through entrance holes without perches, a feat easily accomplished by the bluebird, but challenging for other insectivorous species. The plexiglas enclosure is great for observation, and keeping the mealworms dry, but do make sure to place the feeder out of the sun's hot rays, as this might kill the mealworms. Mealworms can be obtained for local pet supplies store that sell live reptile food or through mail-order.