Meerkats are not endangered. The International Union for Conservation of Nature (IUCN) lists them as Least Concern, meaning the species as a whole faces no immediate risk of extinction. Their range across southern Africa remains broad, and they are locally abundant in places like the Kalahari Desert. But that reassuring label hides a more complicated picture: the best-studied wild meerkat population has experienced sharp declines tied to drought, rising temperatures, and a tuberculosis epidemic that has spread through the Kalahari over the past two decades.
What “Least Concern” Actually Means
A Least Concern classification tells you that across the species’ entire geographic range, population numbers are high enough and the habitat is widespread enough that extinction is not a near-term worry. Meerkats occupy a large swath of southern Africa, from the Kalahari basin through Namibia, Botswana, and into parts of Angola and South Africa. They are adaptable diggers, comfortable in a variety of arid and semi-arid landscapes. No one is drawing up emergency captive-breeding plans for meerkats the way they might for a critically endangered primate.
That said, Least Concern does not mean “thriving everywhere” or “immune to decline.” The classification is a species-wide snapshot and can obscure what is happening to particular populations. The meerkats of the southern Kalahari, which happen to be the most intensively studied wild population on Earth thanks to the Kalahari Meerkat Project running since the early 1990s, have shown researchers just how quickly local conditions can deteriorate for a species that otherwise seems secure.
How Rising Temperatures Hurt Meerkats
Meerkats are small-bodied desert animals, and their lives revolve around the daily math of calories in versus calories out. They spend most of their waking hours foraging for insects, larvae, scorpions, and small vertebrates, and they need to gain enough weight during the day to offset what they lose overnight. Rising temperatures in the Kalahari have started to tilt that equation against them.
Research tracking the long-term Kalahari population found that when daily maximum temperatures climb above roughly 26°C, meerkats of all ages begin gaining less weight during the day. Pups are especially vulnerable: for every one-degree increase in daily maximum temperature, pups lost about 0.8 grams of body mass over the afternoon foraging session. On days exceeding about 41°C, pups actually lost weight overall, burning more energy coping with heat than they could replace by eating.1Functional Ecology. Effects of climate change on pup growth and survival in a cooperative mammal, the meerkat That may not sound like much, but for an animal with an average pup mass around 320 grams, chronic daily deficits add up fast.
The consequences go beyond weight. The same study found that pup survival before three months of age has been declining steadily since the mid-1990s, and the decline tracks closely with increasing maximum temperatures during the months after birth. Pups born into hotter conditions are smaller at three months and less likely to survive to independence. A separate analysis of the same population confirmed that when daily maximum summer temperatures exceed 35°C, foraging efficiency drops across all age classes, and at temperatures above 37°C, the weight meerkats gain during the day often fails to cover what they lose overnight.2Ecological Monographs. Linking climate variability to demography in cooperatively breeding meerkats
Meerkats do have physiological tools for managing heat. Their resting metabolic rate sits well below what you would predict for their body size, which helps conserve energy, and they can ramp up evaporative water loss dramatically under heat stress. At an air temperature of 40°C, their water loss shoots up roughly tenfold compared to comfortable conditions.3PubMed Central. Thermoregulation in the meerkat (Suricata suricatta Schreber, 1776) But that coping mechanism has an obvious cost in a desert: water is scarce. The hotter the climate gets, the more water meerkats need to lose just to stay cool, and the less time they can spend foraging before retreating underground.
Drought Has Hit Harder Than Heat Alone
While temperature gets a lot of attention, a 25-year demographic analysis of the Kalahari population found that annual changes in rainfall have actually exerted a stronger influence on meerkat numbers than temperature shifts. The mechanism is straightforward: rainfall drives plant growth, which drives insect abundance, which drives how much food meerkats can find. When the rain fails, everything downstream collapses.
The most dramatic example came during the 2012–2013 drought, when exceptionally low rainfall was associated with poor recruitment of young meerkats and a drop in population density of over 50%. The population did not bounce back quickly. Intermittent years of low rainfall and frequent droughts in the following period continued to suppress recruitment and slowed recovery for years afterward.4Oikos. Disentangling the effects of temperature and rainfall on the population dynamics of Kalahari meerkats That matters because meerkats are cooperative breeders, and group size is everything. Smaller groups are less effective at watching for predators, less effective at raising pups, and more vulnerable to collapse. A drought that cuts the population in half does not just remove individuals; it undermines the social infrastructure that remaining meerkats depend on to survive.
The interaction between temperature and rainfall makes the outlook more concerning than either factor alone. The Ecological Monographs study noted that body condition dropped most sharply when high temperatures coincided with low plant productivity, the kind of double hit that becomes more likely as the climate warms and rainfall patterns become more erratic.2Ecological Monographs. Linking climate variability to demography in cooperatively breeding meerkats
A Tuberculosis Epidemic in the Kalahari
Since the late 1990s, a strain of tuberculosis caused by Mycobacterium suricattae has been spreading through the Kalahari meerkat population, and it has become one of the most significant causes of death in the study area. Within about eight years of the pathogen’s first detection, exposure reached up to 95% of the population. Roughly a quarter of exposed meerkats went on to develop clinical TB, followed by physical deterioration and death within a few months. Since the disease emerged, about 12% of all recorded deaths have been attributed to TB, although the actual toll is likely higher because some animals disappear before they can be examined.5PubMed. Two decades of tuberculosis surveillance reveal disease spread, high levels of exposure and mortality and marked variation in disease progression in wild meerkats
The social structure of meerkats, the very thing that makes them successful as a species, also makes them vulnerable to infectious disease. Groups huddle together in burrows, groom one another, and share food with pups. All of those close contacts create opportunities for a respiratory and possibly contact-transmitted pathogen like TB to spread. An earlier analysis of the same population found that older meerkats were far more likely to develop the disease: animals over four years old had roughly nine times the risk of those under two. Groups with a previous history of TB had about four times the hazard of disease compared to groups that had never had a case, and the immigration of new members into a group also increased the risk.6PubMed Central. Social and environmental factors affect tuberculosis related mortality in wild meerkats
Immigration introducing TB into new groups is a particularly insidious dynamic. Male meerkats routinely leave their birth group to join or form new ones, and this movement is essential for genetic health. But when dispersing males carry TB with them, it means the disease can leapfrog across the landscape. The population cannot wall itself off from infection without also cutting off the gene flow it needs.
Inbreeding and the Genetic Side of Vulnerability
Meerkats live in groups that are essentially extended families, usually built around a dominant breeding pair. Most subordinates in the group are the offspring of that pair, which creates an obvious problem: if you are looking for a mate, nearly everyone around you is a close relative. In the wild, meerkats strongly avoid inbreeding. Reproduction among both dominant and subordinate females rarely occurs in the absence of unrelated males, and the lack of unrelated partners is the main constraint on whether subordinate females breed at all.7Behavioral Ecology and Sociobiology. Reproductive suppression and inbreeding avoidance in wild populations of co-operatively breeding meerkats (Suricata suricatta)
Despite this avoidance, inbreeding is not entirely prevented. A genetic study of the Kalahari population found that 44% of individuals had detectably non-zero inbreeding levels. About 15% of those inbred animals resulted from moderate inbreeding events, which almost always occurred when the mating individuals had no prior experience of each other, meaning they had not grown up together and could not recognize each other as relatives.8PubMed. Inbreeding and inbreeding depression of early life traits in a cooperative mammal Inbreeding depression, where inbred offspring are less fit, can weaken a population’s ability to cope with other stresses like disease and climate change. For a species that depends on cooperative group living, producing weaker pups is not just a problem for those individual pups; it reduces the future workforce of helpers the group needs to function.
This is where the connection between TB spread and genetic health gets worrying. Dispersal is the main way meerkats avoid inbreeding, and it is also the main way TB spreads to new groups. Any factor that reduces dispersal, like drought shrinking the population or making long-distance travel more dangerous, could simultaneously increase inbreeding risk while reducing TB transmission. Conversely, healthy dispersal keeps the gene pool mixed but gives TB new hosts. The population is caught between two pressures that pull in opposite directions.
The Costs of Cooperative Breeding
Meerkats are one of the most thoroughly studied cooperative breeders in the world, and their social system is both their greatest strength and a source of internal conflict that can weaken the group. In a typical meerkat group, only the dominant female breeds consistently. She enforces this monopoly through escalating aggression toward subordinate females, especially when she is pregnant. Targeted subordinates may be temporarily evicted from the group, and during those evictions they experience chronically elevated stress hormones, suppressed reproductive function, reduced conception rates, and higher rates of abortion.9PubMed Central. Stress and the suppression of subordinate reproduction in cooperatively breeding meerkats
Dominant females do not harass all subordinates equally. They preferentially target older females, pregnant females, and those that are more distantly related, essentially the individuals most likely to actually compete reproductively. This system keeps the dominant female’s own litters safe from competition, but it comes at a cost to group-level reproductive output. And the costs extend over time: females who faced intense intrasexual competition before acquiring dominance went on to have lower breeding success and faster rates of reproductive aging once they became dominant themselves.10Journal of Evolutionary Biology. Competition, breeding success and ageing rates in female meerkats
The eviction of subordinate females also has demographic consequences. Evicted females may attempt to form new groups, but survival during the dispersal period and the first few months of new group formation is lower than for females living in established groups.11PubMed. Dispersal Decreases Survival but Increases Reproductive Opportunities for Subordinates in a Cooperative Breeder In a healthy, expanding population, these costs are absorbed without much trouble. But when the population is already stressed by drought, heat, or disease, losing subordinate females to failed dispersal events shrinks the pool of helpers and potential future breeders even further.
Why the “Least Concern” Label Could Be Misleading
Conservation status classifications are inherently backward-looking. They are based on existing population sizes, current range extent, and documented rates of decline. A species can be classified as Least Concern while the mechanisms for a future decline are already well underway, especially if those mechanisms, like climate change and emerging disease, operate on timescales longer than the assessment interval. The meerkat is a good example of this gap. The species is widespread and numerous enough to clear the Least Concern bar, but the most detailed long-term data available show a population under cumulative stress from warming, drought, TB, and the social consequences of shrinking group sizes.
The Kalahari study population is not necessarily representative of all meerkats everywhere. Populations in cooler or wetter parts of the range may face fewer climate pressures, and TB has not been documented at the same intensity outside the study area. But the Kalahari is core meerkat habitat, and climate projections for southern Africa suggest continued warming and more variable rainfall across the region. The pressures documented in the Kalahari are not unique to that one population; they are early signals of what much of the range may experience in coming decades.
How Diet Ties Into Everything
Meerkats are insectivores with flexible diets, eating beetles, spiders, scorpions, larvae, small lizards, and occasionally plant material. Their food supply is tightly coupled to weather. Research in the southern Kalahari found that consumption of beetles, a key dietary component, was positively correlated with rainfall and negatively correlated with temperature.12Journal of Zoology. Diet and foraging behaviour of group‐living meerkats, Suricata suricatta, in the southern Kalahari In practical terms, hot and dry conditions reduce both the abundance and the availability of their primary prey at exactly the time when meerkats need more energy to cope with heat stress.
This creates a feedback loop. Hotter days mean meerkats need more calories to maintain their weight, but they also mean fewer insects to eat and less time that meerkats can safely spend foraging above ground. Pups, which depend on adults to find and deliver food, are squeezed hardest. The long-term decline in pup body mass and survival documented since the 1990s is almost certainly tied to this cascading effect of temperature on both prey availability and the thermal window for foraging. The 25-year population analysis emphasized that these bottom-up processes, where climate drives food supply which drives reproduction and survival, dominate meerkat population dynamics in arid environments.4Oikos. Disentangling the effects of temperature and rainfall on the population dynamics of Kalahari meerkats
Meerkats as Sentinels for Arid-Zone Wildlife
One reason the meerkat’s situation matters beyond the species itself is that few arid-zone mammals have been studied with anything close to the same intensity. The Kalahari Meerkat Project has tracked individually identified animals for over 25 years, producing an unusually rich dataset on how climate, disease, and social dynamics interact in a wild desert mammal. The patterns emerging from that research, where moderate warming erodes daily energy budgets, drought causes population crashes that take years to recover from, and emerging disease exploits the same social bonds that hold groups together, are likely playing out in other arid-zone species that nobody is watching as closely.
The meerkat may be the best early-warning system we have for understanding how cooperative breeders in drylands will respond to a warming world. Their cooperative system gives them resilience that solitary species lack: sentinel behavior, communal pup-rearing, and shared foraging reduce individual risk. But that resilience has limits, and when group sizes shrink past a certain threshold, the cooperative advantages unravel. The evidence from the Kalahari suggests that those limits are being approached more frequently than they were a generation ago, even as the species as a whole remains comfortably classified as Least Concern.