Bernard Castelein / Great white pelican (Pelecanus onocrotalus) in flight over Allahein river, Kartong, Gambia.

Bernard Castelein / Great white pelican (Pelecanus onocrotalus) in flight, Allahein river, Kartong, Gambia.

Jen Guyton / Nile crocodile (Crocodylus niloticus) at water's edge with Great white pelican (Pelecanus onocrotalus) prey, and other crocodiles nearby trying to steal the prey. Msicadzi River, Gorongosa National Pa...

Jen Guyton / Nile crocodile (Crocodylus niloticus) at water's edge to feed on Great white pelican (Pelecanus onocrotalus) prey. With birds on the shore including pink-backed pelicans (Pelecanus rufescens), marabou...

Jen Guyton / Nile crocodile (Crocodylus niloticus) with Great white pelican (Pelecanus onocrotalus) prey. Other birds watch from the shore, including great egrets (Ardea alba), grey herons (Ardea cinerea) and hame...

Jen Guyton / Nile crocodile (Crocodylus niloticus) catching a Great white pelican (Pelecanus onocrotalus) prey, Msicadzi River, Gorongosa National Park, Mozambique. During the dry season many water sources dry up...

Jen Guyton / Nile crocodiles (Crocodylus niloticus) fighting over Great white pelican (Pelecanus onocrotalus) in the Msicadzi River, Gorongosa National Park, Mozambique. During the dry season many water sources...

Jen Guyton / Nile crocodile (Crocodylus niloticus) eating Great white pelican (Pelecanus onocrotalus). With birds on the shore including pink-backed pelicans (Pelecanus rufescens), marabou storks (Leptoptilos crum...

Jen Guyton / Nile crocodile (Crocodylus niloticus) underwater holding a Great white pelican (Pelecanus onocrotalus) prey. after a group of the birds dove into the river to hunt fish. Here, the crocodile slowly sw...

Jen Guyton / Nile crocodile (Crocodylus niloticus) with Great white pelican (Pelecanus onocrotalus) prey. Other pelicans flying or wings held up in alarm. Msicadzi River, Gorongosa National Park, Mozambique. Duri...

Jen Guyton / Nile crocodile (Crocodylus niloticus) with Great white pelican (Pelecanus onocrotalus) prey. Other pelicans with wings held up in alarm. Msicadzi River, Gorongosa National Park, Mozambique. During th...

Jen Guyton / Great white pelicans (Pelecanus onocrotalus) and pink-backed pelicans (Pelecanus rufescens) diving into the Musicadzi River, Gorongosa National Park, Mozambique. During the dry season many water sour...