by Carl Safina
LIVING ALBATROSSES FALL into four groups: the great albatrosses, several smaller Southern Hemisphere albatrosses, the sooty albatrosses, and the North Pacific species.
Scientists long considered those four groups to comprise thirteen species: two gigantic “great” albatrosses (the Wandering and the Royal); five other Southern Hemisphere types (Black-browed, Gray-headed, Buller’s, Yellow-nosed, and Shy); the Sooty and Light-mantled Sooty Albatrosses; the Galapagos, or Waved, Albatross (for their wavy markings); and the North Pacific’s Laysan, Black-footed, and Short-tailed (or Steller’s) Albatrosses.
Many Southern Hemisphere albatross forms vary from island to island, with slight differences in plumage, eye color, and size. These variants were long considered races or subspecies within the same species, but DNA analysis indicates that some of these varieties are actually different species—depending on your view of how much differentiation constitutes speciation. If you accept this analysis, the Campbell Island Black-browed is a separate species; the Yellow-nosed comprises two species (Atlantic Yellow-nosed and Indian Ocean); the Buller’s and Royal each comprise Northern and Southern species; the Shy is actually a complex of four species (Tasmanian Shy, Auckland Shy, Salvin’s, and Chatham Albatrosses); the Wandering actually includes five species (Diomedea exulans plus Gough, Amsterdam, Auckland, and Antipodes Albatrosses). In all, eleven races have been newly recognized as species by most scientists, bringing the total number of albatross species to two dozen.
We like to say that among animals, forms that cannot freely interbreed are separate species. That’s a good and useful definition for most animals. But because evolution is a gradual process, some varieties—caught present-day in the act of change—are neither clearly the same nor clearly different species. For example, in New Zealand a mixed pair of Northern and Southern Royal Albatrosses produced four fertile offspring over several years. The crisp definition of “species” smudges and blurs at such margins. In nature there is no exact moment of speciation, only accumulated change—degrees of relationship, degrees of separation. Darwin came to his insight on evolution through the differences in very similar Galapagos birds from nearby islands—as though they’d started from a common ancestor and their isolation on different islands had provided time for differing local environments to modify the separate populations’ characteristics. Then he reasoned that the same process of selective breeding used by farmers for centuries was essentially at work in nature; most animals died young, and the individuals best suited for survival under local conditions left more surviving offspring who’d inherited the winning characteristics. He wondered about it, then concluded that, eventually, the birds could accumulate change enough that the different populations would in some cases become no longer mere varieties but actually different species. Because some of the Galapagos finches differed only slightly while others showed considerable change, Darwin perceived the whole process in various stages of progress. It was perhaps the most important insight ever granted a human mind.
Albatrosses’ taxonomy is confusing because albatrosses are Darwin’s finches writ large. Albatrosses have undergone a course of change similar to the finches’, but albatrosses’ islands are separated by hundreds, sometimes thousands of miles. Though they roam extraordinary distances and often mix at sea, they almost always breed on the island they hatched on. For instance, researchers discovered that more than go percent of Gray-headed Albatrosses breed within 250 meters of where they’d hatched years earlier. On Midway Atoll, albatrosses breed an average of 22 meters from the nest they were born in. This makes any albatross nesting ground a neighborhood for extended family, where, over the years, parents and their offspring and their grandchildren may all breed in rather close proximity. But for evolutionary purposes, the birds’ strong tendency to breed at their place of birth keeps the populations almost as isolated as Darwin’s famous finches—isolated enough to evolve different forms on different islands. The isolation of breeding on the world’s remotest islands is continually shaping albatrosses in slow, dynamic change.
THE BREEZE IN MY BEDROOM is the first sign that this morning is different. After days of dead calm, newly moving air has passed its kinetic energy along to the heat-stressed birds. You can feel their excitement in their increased activity.
Patty is doing the day’s first round of her nest checks, looking for any mates of transmittered albatrosses that may have arrived and switched incubation duties. We walk among the incubating birds like grape growers among vineyards. So far all the incubating birds in the study area are familiar, Amelia and the others. No new arrivals. But there has been one premature departure, probably forced by the just-ended heat wave; its abandoned egg is now cool to the touch.
Patty, several yards ahead, suddenly calls and waves.
Has one of the transmittered adults departed? No. But when we walk up, Patty gestures to a Black-footed Albatross standing over an eggshell with a gaping hole at one end and a downy chick beside it. Karen arrives eagerly, and immediately volunteers to guard the chick as we give its parent a transmitter.
Karen gushes, “Oh my God. It’s so cute!” Its head is wobbly. Its little black decurved bill seems proportionally larger than an adult’s. The little wing stubs offer scant hint of the flying power that may come. The chick’s black down, frosted light gray at the tips, is so thick and long and matted that the nestling looks rather oddly like a large fluffy pinecone. It probably weighs about seven ounces. “Oh my gosh, look at its fat little legs!”
The chick stands shakily and stretches its wings, pulling all heartstrings within ten yards. Before the mind had a name for beauty, the heart had a response. The chick instinctively starts digging a scrape for itself with its feet. When it yawns a teetering little yawn, Karen’s hand goes to her face in delight and astonishment. To the chick she says, “I’ll take care of you anytime.”
Her job right now—a tough job if ever there was one—is protecting this chick from possible frigatebird attack and the sun. Karen is concerned that the chick is too exposed. “It’s not used to being out in the sun,” she says. I offer her my hat to shade it, but she’s transfixed.
The chick begins preening, nibbling at its down. The effort seems to tire it, and it rests its head and closes its eyes. When the chick begins to shiver, Karen takes off her sweatshirt and lightly covers it, saying tenderly, “It’s a rough life.”
That it is. But with luck and all odds vanquished, this unsteady little new life may go forward—and outlive us.
A Laysan Albatross walks by, pausing to stare at the chick like an admiring passerby. A nearby nester stands up, looks at its own egg, and starts talking to it. As hatching nears, parents commonly vocalize to their upcoming offspring. And as soon as a chick “holes” or “pips” the egg, it begins talking back. As Dr. Seuss might summarize: Horton finally hears a Who. Parent and child keep the conversation going through the hole in the eggshell during the many hours it takes for the chick inside to painstakingly chisel out.
When our crew has affixed the transmitter, we take the adult back toward Karen and its chick. We place the bird near its nest. It stands there until the chick begins calling, then suddenly runs to it. Laura turns to Karen and says, “Well, Karen, anytime you’d like to help out with the albatrosses—.”
With what might be termed enthusiasm, Karen interrupts. “I would love to help.”
BY OUR FOURTH DAY, ten albatrosses wear transmitters. Now, oddly, the fieldwork is largely done, and most of the data accrual will happen almost passively as technology takes over, reporting the birds’ positions. (So far the data are less than interesting, because none of the birds has moved.) Now we ourselves will also wait faithfully like Horton the elephant, attached by effort and scientific curiosity to the patiently sitting birds.
Each day we check. Each day, the faithful birds at their nests remain.
PATTY IS EXCITED. Halfway through a new day’s morning nest check, she’s just discovered the mate of one of our birds sitting on the
nest. The transmitter-bearing bird is gone!
Dave rides up slowly on his bicycle. Even though the new bird arrived just last night from weeks at sea, it sits here as though nothing is unusual. Amelia and her neighbors, sitting as always, appear equally indifferent.
But Patty is stoked. “Now,” Patty says, “we’ll be getting some data.” Somewhere between the vast Pacific and outer space, albatross, satellites, and Dave’s North Carolina laboratory are already corresponding. Each day the satellites will interrogate the transmitter, and the bird’s location will be beamed to Earth.
Amelia couldn’t care less; she’s still here on her nest near the porch, still broody and dozing.
Patty and Dave set up a laptop computer on a picnic table on the barracks’ back porch, and using a solar panel to power it, they link to a communications satellite to download e-mail. With noddies lined up on the porch rail and the computer set up near the laundry lines, information flows into the laptop from outer space. The transmitter data has already been beamed via another satellite to a facility in France, then sent from France to Dave’s North Carolina lab, and a student has e-mailed it. Result: we discover that our outbound bird is sixty miles north of Tern Island.
Dave, munching from a bowl of cereal, says, “It’s nice to see everything working. It’s really remarkable how all this technology is being coordinated to solve the question of where they go.”
And while most university research data is eventually published years later only in obscurely specialized technical journals, Dave’s approach to this albatross work is very different. Every morning when the satellite data from traveling albatrosses arrives, Dave will e-mail it to over five hundred teachers in classrooms in the United States, Canada, Germany, Estonia, Japan, South Africa, Australia, and elsewhere who have subscribed to Dave’s Albatross Project. Students will map the albatrosses’ travel tracks as they unfold. “I realized early on,” Dave says, “that kids from kindergarten through high school could be discovering what’s happening with the birds at the very same time we ourselves are discovering it.” He adds, “I’m trying to find ways to communicate effectively about science.” Dave believes freedom and democracy require a public that can think critically. “If a scientist has a new idea, his or her first task is to challenge it against everything else that’s known, seeing whether it can be disproved. In most other endeavors, everyone is pushing their own ideas and their own narrow interests. I think that when you teach science, you’re teaching people a way of thinking that can help them stay free.”
DURING THE NIGHT of January 17–18 another transmittered albatross has left Tern Island. But the albatross I call Amelia resides, remains, and rests upon her nest next to the porch steps. We pause. She waits. We watch. She stands, talks in low tones to her egg, flares her brood patch, and sits back down. For now, that has to count as action.
By the following day, two more of the birds are outbound over the ocean. Things are happening. Patty and Dave are departing too, headed home. Patty will leave her birds and begin the hard work of her master’s project in earnest from thousands of miles away.
Getting here has been neither likely nor easy for any of us, biologist or bird. The planning, the traveling, the personal and professional toil, the resolute routes and sheer luck that have led us here—the convergence is quite an improbable one. All of us differ in every detail. All have one thing in common: whether seeking to succeed or striving to breed, we’ve arrived here as survivors of earlier struggles. Hoping our efforts will meet continued luck, we now stand poised for payoff, ready to see our labors produce.
Mark is checking to make sure the cargo and passengers don’t exceed the plane’s weight limit. He weighs all the bags, then calls across the room, “Patty, how much do you weigh?” Patty yells back, “One thirty-four,” then says to me, “Now everybody knows.” I say our time has shot by. Dave looks at his watch to remind himself what month it is.
Waving, waving, waving, they are gone. They leave over the ocean, like everything else.
WHEN AMELIA STANDS for her next nest check, her egg is gone. Between her massive webbed feet sits a gray ball of spiky fluff. By this time, the sixth of February, many of the other albatross nests already harbor chicks.
Amelia broods her baby three days, providing shade and shelter from heat and high winds. When her mate arrives to relieve her in the early morning of February 9, Dad immediately feeds the little chick. Or tries to.
He crouches so far forward toward the chicklet that his breast is touching the nest’s low rim. The hungry chick is eager, pecking shakily at its parent’s bill, peeping a shrill call that sounds like “Me, me, me.” Dad is trying so hard to begin regurgitating that the effort seems to force his wings partly open. At the same time, he is trying to make contact with the chick’s little bill, but the uncoordinated hatchling keeps swinging away at the critical moment.
Eventually, with the kind of persistence that precedes all earned rewards, the male practically swallows the chick’s head. In the cavern of its father’s gape, the chick opens its wobbly little bill. Dad squirts a concentrated stream of gooey, nutritious, liquefied oil into the chick’s throat. Unlike most other birds, albatrosses and their tube-nosed relatives store oil extracted from their food. Albatross stomach oil is so energy rich that its mean caloric value rates just below that of commercial diesel oil.
After wiping its beak, the chick half stands and waves its little wings, then sits back down contentedly. For the moment, all’s right with the world.
And so a new phase kicks in. Amelia and her mate must now no longer simply share incubation shifts; the chick’s arrival begins a period of increasing strain in an already strenuous life. Bodily reserves will be taxed to the max. Now food is the issue.
Somewhere out on the sea, these birds are finding a food supply that is not at all obvious when you look at the surface of that vast ocean. But find it they do. All together, the seabirds of the Northwestern Hawaiian Islands require an estimated eight hundred million pounds of prey annually, largely fishes, crustaceans, and squids—perhaps two-fifths of the annual production of those animals in the ocean region. Of the amount consumed, albatrosses probably take half. Laysan and Black-footed Albatrosses eat mostly various species of squid, fishes, fish eggs, crustaceans, and anything else living or formerly living that they can hook their bills into. Albatrosses in general eat everything from small fishes to dead seabirds to squid to krill to gelatinous drifting tunicates to jellyfish (including the famously sting-infested Portuguese Man-of-War). If they find a dead whale, their diet will include whale meat. Sometimes they feed on scraps of skin and blubber of whales killed by Killer Whales or by people. What they eat depends on where they happen to be and what they find. Many albatrosses follow ships, because even kitchen scraps can make an albatross happy. They are inveterate scavengers and opportunists. When it comes to eating, albatrosses’ motto seems to be “Better full than fussy.”
But in practice, almost all albatrosses almost everywhere eat mostly squid. It’s even been suggested that albatross evolution and radiation around the world has corresponded to squid evolution as the birds became skilled squid finders. Squids are highly evolved, unusually successful predators in their own right. The Cretaceous mass extinction wiped out not only dinosaurs but also many kinds of marine life that had flourished for an enormity of time. As the disappearance of dinosaurs opened the land to opportunities for birds and mammals, the extinction of marine faunas opened the seas to the radiation and proliferation of modern fishes and squids, with new monarchies of predators. The rapidly spreading new jet-propulsion-bodied animals we know as squids evolved complex behavior, excellent eyesight, and surprising smarts (they have been called “the soft intelligence” and “honorary vertebrates”). Squids have proliferated into over seven hundred species moving throughout the world’s seas, from sunlit reefs to the black abyss, from the size of your little finger to the Giant Squid, measuring almost sixty feet.
Enter albatrosses
. Albatrosses eat about seventy species of squid. At times the birds catch them live and vigorous. But they also exploit the fact that many kinds of squid die en masse after spawning. About a day after dying in the chilly deep, the carcasses of many species of squid float to the surface, buoyed by increasing ammonia resulting from chemical changes in their livers. Albatrosses rely heavily on this phenomenon, which makes deep food available. In the western Tasman Sea off New South Wales, Australia, a spectacular postnuptial appearance of dead and dying ten-pound Giant Cuttlefish prompts a remarkable convergence of albatrosses. Birds from half a world away—from the South Atlantic, Indian Ocean, and New Zealand—find it worth their while each year to come for the funeral feast. In sum: albatrosses eat a lot of squid. People also eat a lot of squid, and fishing boats remove enormous quantities of the food albatrosses have for millennia relied on. In much of the world, squid fishing is done at night, using bright lights to attract squid to the boat as moths are attracted to porch lights. So great is the fishing pressure now that the lights of squid-fishing fleets are visible to astronauts in space, appearing like cities in the sea.
WITH DAD NOW NESTBOUND, it’s Amelia’s turn to face the vicissitudes of the ocean, but she’s an experienced pro. So far, she has survived all trials of weather, threats of starvation, and hazards of humanity. She launches herself from the runway and strikes immediately northward.
Amelia sails past the island’s shore, skims across the lagoon, and rises above the towering breakers beyond the reef, setting her course upon an open ocean, striking out into the wide trance of the sea.