Claudio Contreras / Male Brown booby (Sula leucogaster) in flight, Isabel Island National Park, Sea of Cortez (Gulf of California) Mexico, March

Tim Fitzharris / Brown Pelican (Pelecanus occidentalis) flock taking flight from a rocky shoreline, Isla Isabel, Nayarit, Mexico

Tui De Roy / Blue-footed booby (Sula nebouxii) flock in flight. Punta Vicente Roca, Isabel Island, Galapagos.

Claudio Contreras / Blue-footed booby (Sula nebouxii), Isabel Island National Park, Sea of Cortez (Gulf of California), Mexico, December

Rolf Nussbaumer / Least tern (Sterna antillarum), adult with newly hatched young, Port Isabel, Laguna Madre, South Padre Island, Texas, USA. June

Rolf Nussbaumer / Least tern (Sterna antillarum), young tern running, Port Isabel, Laguna Madre, South Padre Island, Texas, USA. June

Rolf Nussbaumer / Least tern (Sterna antillarum), adult feeding newly hatched young with fish prey, Port Isabel, Laguna Madre, South Padre Island, Texas, USA. June

Rolf Nussbaumer / Least tern (Sterna antillarum), adult warming newborn chicks, Port Isabel, Laguna Madre, South Padre Island, Texas, USA. June

Rolf Nussbaumer / Least tern (Sterna antillarum), adult warming newborn chicks, Port Isabel, Laguna Madre, South Padre Island, Texas, USA. June

Rolf Nussbaumer / Least tern (Sterna antillarum), adult feeding newly hatched young with fish prey, Port Isabel, Laguna Madre, South Padre Island, Texas, USA. June

Rolf Nussbaumer / Least tern (Sterna antillarum), adult with newly hatched young, Port Isabel, Laguna Madre, South Padre Island, Texas, USA. June

Rolf Nussbaumer / Black skimmer (Rynchops niger), adult with chick, Port Isabel, Laguna Madre, South Padre Island, Texas, USA. June