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"Goldeneyes do not excavate nest holes; they look for natural cavities or old woodpecker nests" according to the Wingspan card
Island Line Trail Causeway, Vermont D3400 + Tamron 150-600mm F5-6.3 G2 @ 600mm, ISO 100, 1/500, F8(3MP crop, equiv 2397mm F32)
San Francisco R7 + 70-200mm F2.8 @ 200mm, ISO 125, 1/1600, F2.8(7MP crop, equiv 684mm F9.5)
San Francisco R7 + 70-200mm F2.8 @ 200mm, ISO 200, 1/1250, F2.8(10MP crop, equiv 564mm F8)