Evolution may improve the chances of some albatross populations surviving climate change, but a recent model of black-browed albatrosses at Kerguelen found that adaptation alone was generally not enough to prevent decline under projected warming. In that model, substantially limiting greenhouse-gas emissions reduced projected extinction probability by about half. That is a modeled result for a particular population and set of scenarios—not a prediction for every albatross colony.
The title’s claim that albatross numbers fell 67% in 64 years cannot be verified from the available primary sources: its species, population, and census dates are not established. The evidence does show serious, differently measured declines in several South Georgia populations, but those figures cannot be substituted for the 67% claim.
Can evolution keep up with a changing climate?
Sometimes evolution can help a population cope with environmental change. The key question is whether inherited changes can improve survival or reproduction quickly enough to matter while conditions worsen. For the black-browed albatross population studied at Kerguelen, the answer from a recent eco-evolutionary model is: adaptation can help, but generally cannot carry the population through projected warming on its own.
The Woods Hole Oceanographic Institution (WHOI) summary, published September 22, 2026, describes a study combining more than three decades of demographic and physical-trait observations with a population model and climate projections. The model considered how traits and life-cycle processes—including breeding timing, survival, and reproduction—shape population trajectories. It also included demographic and internal climate variability. Wing length was one of four functional traits examined and was linked in the announcement to juvenile survival.
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Evolution in this context means inherited trait changes accumulating across generations through natural selection. It is not an individual bird changing during its lifetime, nor does it mean every bird adapts in a way that benefits the population. For a long-lived bird, generations turn over slowly. A population can decline before beneficial inherited changes become common enough to alter its trajectory.
The study announcement says inherited trait change alone contributed little to reducing extinction risk in the modeled cases. The result depends not simply on whether a species has adaptive capacity, but on how strongly selection acts, how climate affects vital rates such as survival and reproduction, how quickly conditions change, and which parts of the life cycle are affected.
What changes when greenhouse-gas emissions are limited?
In the WHOI summary, substantially limiting greenhouse-gas emissions reduced the modeled probability of extinction by approximately half. This is a comparison among projections, not an observed halving of real-world extinctions and not a guarantee for any one colony. The release does not give the exact scenario values in the summary, so the result should not be treated as a universal percentage for albatrosses.
The important distinction is that climate mitigation changes the pace and magnitude of the environmental pressure. That can make it more possible for adaptation to contribute to persistence. As National Center for Atmospheric Research scientist Marika Holland put it in the WHOI announcement, “The rate and magnitude of future climate warming impacts the effectiveness of evolutionary adaptation.”
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What do the South Georgia counts show?
South Georgia is a separate population context from Kerguelen. A British Antarctic Survey (BAS) assessment published September 8, 2025 reports the following breeding-pair estimates and long-term trends. Its decline intervals vary by species and should not be collapsed into a single 64-year figure.
| Species at South Georgia | Estimated breeding pairs | Share of revised global total | Reported decline | Annual trend by survey interval |
|---|---|---|---|---|
| Wandering albatross | 1,278 | 13.3% | 39% over the species-specific 32–40-year interval | −1.7%/year in 2003/2004–2014/2015; −0.1%/year in 2014/2015–2023/2024 |
| Black-browed albatross | 55,119 | 7.6% | 46% over the species-specific 32–40-year interval | −1.8%/year in 2003/2004–2014/2015; −1.1%/year in 2014/2015–2023/2024 |
| Grey-headed albatross | 18,475 | 28.7% | 66% over the species-specific 32–40-year interval | −5.0%/year in 2003/2004–2014/2015; −4.1%/year in 2014/2015–2023/2024 |
The same BAS summary says annual declines slowed in the later survey interval for all three species, but the populations continued to decline. These counts and trends apply to South Georgia; the grey-headed albatross’s reported 66% decline is not evidence for a separate claim of a 67% decline over 64 years.
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Is climate the only cause of albatross declines?
No. The South Georgia assessment identifies both bycatch in fisheries and climate impacts as major threats. Bycatch can kill birds caught on fishing gear, including outside South Georgia waters. Climate-related effects include southerly shifts in Antarctic krill, a food source, for some Thalassarche species. BAS identifies addressing bycatch as a clear management priority.
A 2017 BAS analysis describes different interactions among pressures: for wandering and black-browed albatrosses, bycatch reduced juvenile and adult survival before temperature, reduced sea ice, and stronger winds affected recovery potential. For grey-headed albatrosses, bycatch impacts on adult survival were compounded by reduced food availability after El Niño events. A 2017 summary described declines of 40–60% over 35 years in three South Georgia species; the newer survey gives more recent, species-specific estimates and intervals.
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Other regions have different species and threats. A U.S. Geological Survey assessment of Laysan and black-footed albatrosses in the North Pacific describes these birds as long-lived, late-maturing, and low in fecundity, with high adult survival; it identifies commercial-fishery bycatch as the greatest human-caused source of post-fledging mortality for those two species. Those findings provide context for why survival and fisheries matter, but they are not measurements of the Kerguelen or South Georgia populations.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What does “67% in 64 years” actually establish?
On its own, the percentage and time span are not enough to interpret a population trend. A reliable figure needs to identify the species, geographic population or colony, what was counted (for example, breeding pairs or total abundance), and the baseline and endpoint years. It should also be clear whether the figure comes from observed counts or a model.
The original monitoring or assessment behind the 67%/64-year claim is not identified by the available sources. Until a primary source establishes those boundaries, the number should not be presented as a verified albatross-wide statistic or attached to a particular species. The South Georgia survey illustrates why: different species there have different decline estimates and time intervals, while the Kerguelen study reports future modeled extinction risk rather than a historical census decline.
What can protect albatross populations alongside adaptation?
Evolution is not a substitute for reducing the pressures that drive mortality and weaken recovery. The evidence cited here points to two complementary priorities: limiting future climate change and reducing fisheries bycatch. Which local measures matter most depends on the population and its routes, feeding grounds, and breeding habitat.
For policy context, Australia’s 2022 National Recovery Plan for albatrosses and petrels covers 20 listed species under Australian jurisdiction. Its measures address breeding habitat, threats on land and at sea, research, and public awareness; it is not evidence for the 67%/64-year statistic.
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