mites, blowfly larvae) from the old nesting material can also act as a strong deterrent for cavity selection. However, the threat of ectoparasites (e.g. Birds often choose to reuse successful natural cavities because constructing a nest from scratch requires critical and limited time and energy. With a finite number of natural cavities to choose from, most birds can’t afford to be too picky. Nest selection of natural cavities is quite different in comparison to our handy nest boxes. In natural cavities, birds often must deal with old nesting material that is already present. Once the breeding season comes to a close, our nest boxes are abandoned and the leftover nesting material remains, which leaves the question, “What should be done with old nests?” Nest boxes vs natural cavities Eastern Bluebirds In A Tree Cavity As the season progresses, we watch the naked hatchlings grow and develop into fully-feathered fledglings. Prior to the breeding season, we make sure that our nest boxes are ready for their future occupants. Steven Liffmann By Anita Tendler, Cornell Class of 2019 To Clean Or Not To Clean Your Nest Box? Photo ©
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