Hidden, Unnamed and Running Out of Time

When we talk about the animals most at risk from climate change, the usual suspects come to mind. Polar bears on shrinking ice. Coral bleaching across warming reefs. Migratory birds arriving to find their ecosystems out of sync. These stories are real and they matter.

But there is a whole category of wildlife that barely registers in the conversation, despite being extraordinarily vulnerable. They live underground, in some of the most stable environments on Earth, and that stability is precisely what makes them so fragile.

Evolutionary Time Capsules

Caves are not the lifeless voids most people imagine. They are, in fact, remarkable habitats. Underground air temperature and humidity stay remarkably consistent year-round, creating conditions that many surface-dwelling animals could not tolerate. For species that cannot handle fluctuations above ground, caves function as permanent refuges.

Ecologists call cave-dwelling creatures troglofauna, from the Greek for "cave dwellers." They include blind fish, blind eels, blind wasps, spiders, beetles, and one of the more extraordinary groups of all: cave crickets. Australian caves are home to a surprising diversity of these animals, many of which evolved in underground environments over millions of years and exist nowhere else on Earth.

Researchers from Adelaide University published findings in early June 2026 describing three previously unknown species of cave cricket from Victoria and New South Wales. The species, part of the genus Speleotettix, were identified through a combination of field collections, DNA analysis, and morphological study. Fewer than 30 Australian cave cricket species have been formally described to date, but the researchers suspect the true number is at least double that.

The discovery matters not just as a taxonomic curiosity. In Australia, a species cannot be assessed for extinction risk or protected under environmental law until it has a formal scientific name. Unnamed species are, in effect, invisible to conservation frameworks. Every new description is a step toward legal protection.

Cave Room Service

Cave crickets are stranger than they look, and they look quite strange. Spindly, spider-like, with extraordinarily long antennae and legs, they are adapted to navigate darkness. But they are not passive inhabitants of their underground world. They play an active and critical ecological role, one that only becomes clear when you watch what they do at night.

When darkness falls, cave crickets venture out of the cave entrance to forage on the surface, feeding on vegetation, other insects, and whatever else they can find. Food is scarce underground, so cave crickets effectively subsidise the cave ecosystem by importing nutrients from the surface. They become prey for other cave species, and the nutrients they excrete inside the cave feed organisms that cannot leave at all. As the Adelaide researchers put it, they are essentially cave room service.

Bats, in particular, depend on this relationship. The nutrient cycle that cave crickets sustain supports not just the cricket's direct predators but entire webs of cave life. Remove the crickets and the ecosystem they anchor begins to unravel.

The Problem with Stability

Here is where climate change enters, and where the cave cricket story becomes a warning.

The very quality that makes caves such effective refuges, their environmental consistency, is also what makes the organisms that evolved within them so poorly equipped to handle change. Surface species have spent millions of years adapting to seasonal temperature swings, humidity fluctuations, drought and rain. Cave species have not. Their tolerances are narrow. Their capacity to adapt quickly is limited.

As global temperatures rise, warmer and drier conditions are increasingly intruding into cave environments. Air temperatures inside caves are influenced by the temperature of the rock and soil above them. As that changes, so does the cave microclimate. For species that can quickly dry out when humidity drops even modestly, or that are sensitive to temperature shifts of just a few degrees, this represents a genuine existential threat.

The Adelaide researchers are clear on this point: the changes coming for Australian cave environments are not a distant possibility. They are already underway in some regions, and the animals most affected are the ones least visible to conservation efforts.

The threat is compounded by additional pressures. Clearing of native forest above cave systems reduces the moisture and temperature buffering that vegetation provides. Invasive predators, particularly foxes and cats, take cave crickets when they venture to the surface at night. Tourism disturbs cave environments. And because most cave species have extremely small ranges, often a single cave system or a handful of connected caves, any localised disturbance can be enough to push a population toward collapse.

The Naming Problem

There is a particular frustration at the heart of cave conservation that the Adelaide research highlights directly.

Large, visually appealing species attract scientific attention and conservation funding. Charismatic megafauna, as researchers call them. Small, pale, blind insects living in darkness do not photograph well and rarely make the news. The result is that subterranean biodiversity is systematically under-described, under-studied, and under-protected relative to its actual ecological importance and extinction risk.

The cave cricket research is funded through Australia's National Taxonomy Research Grant Program, which exists precisely because taxonomy, the formal description and naming of species, has been chronically underfunded for decades. Without taxonomists, species go unnamed. Without names, they cannot be listed. Without listings, no conservation management plans are written, no habitat is formally protected, and no recovery targets are set.

It is a structural gap, not a scientific one. We know cave ecosystems exist. We know they are threatened. We simply have not invested in understanding what lives in them.

Two Notes of Good News

The cave cricket story is a call to pay attention to the places and creatures that don't make it into the headline conservation conversation. On that note, it's worth ending with two pieces of genuinely good news from the past few weeks that are very much in the headlines.

Scientists from the Wildlife Conservation Society and Macquarie University presented findings this month identifying 165,922 square kilometres of climate-resilient coral reefs across 71 countries and 100 territories, three times more than previous estimates. The analysis, presented at the Our Ocean Conference in Kenya on 16 June, found that reefs can persist in a warming world through three distinct pathways: some exist in natural cool spots that buffer them from heat, some have evolved to resist elevated temperatures, and some recover more quickly than average after bleaching events. More than 60% of these resilient reefs are found in five countries, with Australia among them alongside the Bahamas, Cuba, Indonesia and the Philippines. The research is being used to underpin a new campaign, Our Reefs Our Future, calling on governments to prioritise the protection of these reefs within their 30x30 marine commitments.

And on 7 June, French Polynesia announced it would expand its fully protected ocean waters by a further 520,000 square kilometres, bringing the total area of its exclusive economic zone under full protection to approximately 1.4 million square kilometres, or 30% of its waters. The expanded zone includes critical habitat for 20 shark species, including the critically endangered scalloped hammerhead, as well as 22 seabird species and important migratory routes for whales. The protections were developed over more than a decade in partnership with local communities across the Austral and Marquesas Islands, and include provisions for traditional small-scale fishing to continue. Conservation International described it as the single largest national contribution to the global 30x30 goal to date.

Both developments are significant. Both are worth celebrating. And both are reminders that progress in conservation, whether it's naming a cave cricket in Victoria or protecting a stretch of Pacific Ocean larger than continental France, depends entirely on whether someone decided it was worth paying attention.

Sources: Perry G. Beasley-Hall & Brock A. Hedges, Adelaide University, published in The Conversation, 2 June 2026; Wildlife Conservation Society & Macquarie University, Our Ocean Conference, Mombasa, 16 June 2026; Mongabay, 8 June 2026; Conservation International, 8 June 2026.