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Bluebirds have two or three nestings per year so do not give up trying to attract them. Keep monitoring your bluebird nest boxes and make sure that they aren’t occupied by house sparrows.
The key for a bluebird nest box is to have the hole be exactly 1.5 inches in diameter. Too large of a hole invites starlings and makes it easier for squirrels and other larger rodents to get in.
Invasive sparrows and starlings can hurt native bird populations, while ants may invade bluebird nest boxes. Dealing with pests in your yard: Starlings, sparrows, and ants attacking nest boxes ...
Appweavers, Inc., [10] the licensee of the Peterson field guides for mobile devices, has developed the Peterson Birds of North America [11] and Peterson Feeder Birds of North America [12] apps for mobile Apple products. The Peterson Birds of North America app also includes some content from other books in the Peterson field guide series.
He conducted tests and experiments on ways to protect bluebird nest boxes from snakes and other predators. [6] He constructed a snake pit filled with black rat snakes to support his experiments and test predator guards. Results of those tests are referenced in a number of books on bluebirds. [7]: 57–59
To further deter sparrows from consuming grain, people actively engaged in creating loud noises, disrupting the birds and making it challenging for them to rest. [20] Simultaneously, the campaign encouraged the destruction of sparrow nests as a means to impede their reproduction, contributing to the broader objective of decreasing sparrow ...
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The Peterson Identification System is a practical method for the field identification of animals, plants and other natural phenomena. It was devised by ornithologist Roger Tory Peterson in 1934 for the first of his series of Field Guides [1] (See Peterson Field Guides.) Peterson devised his system "so that live birds could be identified readily ...
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