Having spotted a fish, the Booby adjusts its flight to remain above it, and then flips over into a dive with its neck and head twisted to keep its eye firmly on the target. Just before entering the water, its wings fold in tight so as not to be injured by the impact.
<a href="//commons.wikimedia.org/w/index.php?title=User:ImagePerson&amp;action=edit&amp;redlink=1" class="new" title="User:ImagePerson (page does not exist)">Paul Harrison</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>