Evenly spaced tern eggs on Helens Reef Island nesting ground.

Terns over nesting area on Helens Island Reef Island.

A species of booby nesting - adult with chick. Ca. 1967. Northeast coast of Oahu.

A species of tern on Bird Island. Northeast coast of Oahu.

A fairy tern chick seeking shelter from the sun.

Ornithologist tagging a booby on Bird Island.

Adult booby and chick.

A mixed rookery of boobies and terns.

Coconut crab climbing tree. Crab carapace is about 6" in diameter. With claws, crab is about a foot in diameter. Claws are capable of opening coconuts. Edible by humans.

Coconut crab climbing tree. Crab carapace is about 6" in diameter. With claws, crab is about a foot in diameter. Claws are capable of opening coconuts. Edible by humans.

Determining if turtle nest present and counting the number of eggs. This was a successful investigation. Green turtles nest on Helen's Reef routinely.

Helen's Reef - a classic desert island - elevation above sea level about 8 feet.

A tern rookery on Helen's Reef. Scientist was making a count of the number of nests.

Scientist diverted from the business of nest counting by glass fishing float.

The cliffs with an albatross passing by.

On the beach at Laysan Island - monk seal lying on the beach about 100 feet away .

Scientist counting albatross chicks on Laysan Island - highly saline lake in background is full of brine shrimp and salt flies which serve as food for Laysan teal.

Monk seal on the beach at Laysan Island. Note ripple pattern in coral sand.

A motmot bird who thought he'd found a quiet place to roost for the night.

Galapagos sea lions - Zalophus californianus wollebacki.

Marine iguanas - Amblyrhynchus cristatus.

Galapagos sea lions - Zalophus californianus wollebacki.

Galapagos sea lions - Zalophus californianus wollebacki.

Galapagos sea lions - Zalophus californianus wollebacki.

Galapagos sea lions - Zalophus californianus wollebacki.

Galapagos sea lions - Zalophus californianus wollebacki.

Galapagos sea lions - Zalophus californianus wollebacki.

Galapagos sea lions - Zalophus californianus wollebacki.

Galapagos sea lions - Zalophus californianus wollebacki.

Galapagos sea lion - Zalophus californianus wollebacki and a marine iguana - Amblyrhynchus cristatus.

Galapagos sea lion - Zalophus californianus wollebacki and blue-footed booby - Sula nebouxii.

Blue-footed boobies - Sula nebouxii.

Blue-footed boobies - Sula nebouxii.

Blue-footed boobies - Sula nebouxii.

Blue-footed boobies - Sula nebouxii.

A blue-footed booby - Sula nebouxii and nesting waved albatross - Diomedea irrorata.

Waved albatross - Diomedea irrorata.

Waved albatross - Diomedea irrorata - taking off.

Masked boobies - Sula dactylatra.

Masked booby - Sula dactylatra.

Masked booby - Sula dactylatra - tending nest.

Red-footed booby chick - Sula sula.

Red-footed booby - Sula sula.

Red-footed booby - Sula sula.

Red-footed booby - Sula sula.

Red-footed booby - Sula sula.

Frigate bird - Fregata magnificens.

A Galapagos penguin - Spheniscus mendiculus. The Galapagos penguin is the smallest of the penguin family.

A Galapagos penguin - Spheniscus mendiculus. The Galapagos penguin is the smallest of the penguin family.

Galapagos sea lions - Zalophus californianus wollebacki - lounging on basalt blocks along a volcanic rock shoreline.