There are various species of pelicans all over the world. But the only one that dives from aloft to catch fish is the brown pelican. They live in coastal areas of North, Central, and South America. When watching them dive in real time they appear as if they crash into the water out of control with wings all awry. But viewed with still photography or ultra slow-mo video it is obvious that they are in total control of their bodies.
The classic photos typically published of brown pelicans are shots of them skimming just above the surface of the water, often several birds in single file formation. But when they fish they glide along a few meter above the surface looking down at the water with their long necks folded in an S shape. When they spot fish they maneuver very quickly into a dive, wings partially folded and necks still held in the S shape. Just before they strike the water the head shoots out, much like the strike of a snake, and the wings are thrown straight back. By shooting out the head/neck the pelican can make the last second fine tuned adjustment needed to hit its mark. And by throwing the wings straight back there is less resistance when it hits the water allowing the bird to dive deep after the fish. Under water the bird opens its mouth wide and uses its famous purse shaped lower beak like a net to scoop in the fish.
This afternoon I shot several sequences of what is described above. Like every wildlife subject there is a learning curve to anticipate the animal's behavior. This was my first attempt at this particular critter plus I was shooting in poor light just before sundown in drizzling rain. In the coming weeks I hope to get some opportunities under better shooting conditions.
This sequence represents 0.6 seconds of real time.
All shot with Nikon D500, 200-500mm, handheld
1/800s, f5.6, ISO1600, 10fps
1) Pitching over into its dive.
2) Lining up and wings partially folded for speed.
3) Wings folding farther to increase speed.
4) Final maneuvers. Note the head is turned sideways and neck starting to shoot out in a slightly different direction than where the body is going.
5) Wings straight back as it enters the water to reduce resistance.
6) Look how deep the bird goes. With neck fully extended and wings straight back this bird is easily 1.5-2.0m long. Also note how small the splash is indicating how streamlined the bird was when it entered the water.