138. A Balearic Shearwater Puffinus mauretanicus approaching its nesting cave (upper left) on Sa Dragonera, Mallorca, April 2019. The changeover between the two parents during incubation takes place about once a week. During my first night, I missed the incoming bird because of a technical problem. Each night, I made about 2,000 images, all of which were completely black until, four nights later, a bird arrived for the changeover. This time it worked: one week of nocturnal work, one picture!
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