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Earth Matters: Birdhouses definitely not one size fits all A bluebird stands atop a bluebird nest box in Serpentine Prairie in Redwood Regional Park in Oakland, Calif. The wire mesh hole extension protects against predators. Steven dosRemedios/via Flickr Published: 3/12/2021 4:13:46 PM Birdhouses seem simple. Because people cut down dead and dying trees, cavity-dwelling birds can’t find enough nest sites. If we put up birdhouses, those birds can nest there instead, and we all live happily ever after. Right? Unfortunately, no. Many birdhouses are home only to spiderwebs, moth cocoons or the occasional wasp hive. Other nest boxes are too popular, with birds fighting over them, sometimes even with casualties.

United statesJoshua roseCornell lab of ornithologyHampshire bird clubHitchcock centerNew englandCornell labஒன்றுபட்டது மாநிலங்களில்ஜோஷுவா உயர்ந்ததுகார்னெல் ஆய்வகம் ஆஃப் ஆர்‌நிதாலஜீஹாம்ப்ஷயர் பறவை சங்கம்ஹிட்ச்காக் மையம்புதியது இங்கிலாந்துகார்னெல் ஆய்வகம்