A white-breasted Nuthatch brings insects in its beak back into its manmade nest cavity

nest box nuthatches nuthatch whitebreasted nuthatch nest hole in tree birds living hole whitebreasted bird birds nesting avian wood cavity out of focus background insects prey wooden insect wood box worn inside spring feed young one predator canada manmade isolated alone old usa united states mouthful food moving greenery go in summer walking on babies single white