Pangolin Hydration: How Pangolins Get Water in the Wild

Pangolins are among the most water-efficient mammals on the planet. Field researchers observing pangolins in Africa and Asia rarely witness them drinking from open water sources, yet these animals thrive in environments ranging from tropical rainforests to semi-arid savannas. How do pangolins stay hydrated? The answer lies in a combination of metabolic water extraction, moisture-rich prey, and opportunistic water intake that reflects millions of years of adaptation to insect-based diets.

Water From Prey: Metabolic Moisture

The primary source of hydration for wild pangolins is the water contained within their prey. Ants and termites -- the exclusive diet of all eight pangolin species -- have a surprisingly high moisture content. Worker termites are composed of approximately 65 to 75 percent water by fresh weight, while ant workers typically contain 55 to 70 percent moisture. For an animal consuming several hundred grams to over a kilogram of insects per night, this represents a substantial daily water intake that does not require any direct drinking from a water source.

Beyond the physical water in prey bodies, pangolins extract metabolic water from the oxidation of organic compounds during digestion. When carbohydrates, fats, and proteins from insect biomass are metabolised, water is produced as a byproduct. In arid-adapted mammals, metabolic water production is an important supplementary hydration mechanism. While pangolins in humid tropical habitats have abundant environmental water available, those in drier savanna environments appear to rely on metabolic water as a significant proportion of their daily hydration budget.

Dew, Rain, and Opportunistic Drinking

Although direct drinking from water bodies is rarely observed in pangolins, field studies using camera traps and GPS telemetry have documented opportunistic water intake in several ways. Pangolins have been photographed licking morning dew from grass stems and leaf surfaces during predawn foraging activity. In areas with seasonal rainfall, pangolins appear to modify their foraging routes after heavy rain events, and scat analysis suggests increased consumption of ground-level invertebrates that become more accessible in wet soil -- indirectly increasing total moisture intake.

Ground pangolins (Smutsia temminckii) in southern African savannas have been observed drinking from seasonal waterholes and puddles on a small number of occasions documented in the literature. These observations are notable precisely because they are unusual: they suggest that while pangolins do not depend on open water sources, they will consume water opportunistically when it is readily accessible and when their normal prey-based hydration may be insufficient -- for example, during extended dry seasons when insect prey biomass declines.

Tree pangolins and arboreal species in West and Central Africa may obtain additional moisture by licking water that accumulates in tree hollows, leaf axils, and the bark of epiphyte-covered branches during the wet season. Direct observations of this behaviour are limited, but the anatomy of the pangolin tongue -- long, slender, and highly mobile -- is well suited to extracting water from confined spaces that would be inaccessible to species with less specialised lingual anatomy.

The Role of Burrowing in Water Balance

Ground-dwelling pangolin species spend the day in burrows, and burrowing behaviour is closely linked to thermoregulation and water balance. The microclimate within a burrow differs substantially from the surface environment: temperatures are lower and more stable, and humidity is higher. By resting in burrows during the heat of the day and foraging at night when temperatures fall and relative humidity rises, pangolins minimise evaporative water loss from respiration and skin.

Pangolin skin is covered with overlapping keratin scales that reduce transepidermal water loss significantly compared to exposed, non-scaled skin. The scales act as a partial barrier to water evaporation, helping pangolins maintain hydration in dry conditions. Respiratory water loss is mitigated by the pangolin's relatively low metabolic rate and the fact that it breathes slowly and shallowly when curled in a defensive ball or at rest in its burrow.

In the Kalahari and Karoo regions of southern Africa, where Temminck's ground pangolins occur, average annual rainfall can be as low as 150 to 200 millimetres. In these environments, burrow use and nocturnal activity are not merely energy conservation strategies -- they are critical water conservation mechanisms that allow pangolins to persist in conditions that would rapidly dehydrate less-adapted mammals of similar size.

Hydration and Insect Colony Seasonality

Ant and termite colony availability and moisture content fluctuate seasonally. In the wet season, soil-dwelling termite colonies are active near the surface and have high water content. In the dry season, termites retreat deeper underground and may have lower moisture content per unit mass as colonies reduce activity. Ground-foraging pangolins in seasonal environments may compensate for reduced prey moisture by extending foraging time, covering larger areas, or shifting to ant species that remain more active in dry conditions.

Research in the Lowveld region of South Africa has shown that Temminck's ground pangolins increase their movement range during the dry season, consistent with a search for prey that is more dispersed when soil moisture is low. GPS tracking data suggest that females with young, which have higher total metabolic water requirements, show the greatest increase in dry-season movement range -- a pattern consistent with moisture as well as caloric limitation driving this behaviour.

Hydration Failure in Captivity: A Critical Problem

Understanding pangolin hydration biology has direct practical implications for rehabilitation and captive management. Pangolins that have been confiscated from traffickers often arrive severely dehydrated after days or weeks without adequate food or water in transit containers. Intravenous or subcutaneous fluid therapy is frequently required to stabilise dehydrated animals, but identifying signs of dehydration in pangolins is challenging: the standard skin turgor test used in many species is less reliable in animals with extensive scale coverage.

Veterinary teams have developed indirect indicators of hydration status in pangolins including assessment of mucous membrane moisture, eye sunkenness, and -- where scale removal allows -- localised skin turgor testing on the ventral surface. Blood biochemistry, particularly blood urea nitrogen and haematocrit, provides more reliable hydration assessment when blood sampling is feasible. Provision of moisture-rich prey -- live termites, fresh-frozen ants -- is preferred over direct water supplementation where possible, as it mirrors the natural hydration pathway and encourages animals to self-feed.

Asian Versus African Species: Habitat Differences

Water availability and hydration strategies differ between African and Asian pangolin species in ways that reflect their distinct habitat types. Asian species including the Sunda pangolin (Manis javanica), Chinese pangolin (Manis pentadactyla), and Indian pangolin (Manis crassicaudata) typically inhabit humid tropical and subtropical environments where ambient moisture is high and seasonal water stress is less severe than in African savanna habitats.

In contrast, the four African species span a wider range of rainfall regimes. The giant ground pangolin (Smutsia gigantea) occurs in Central African rainforests with year-round high humidity, while Temminck's ground pangolin ranges across some of the driest regions where any pangolin is found. This ecological contrast makes Temminck's ground pangolin an important study species for understanding the limits of pangolin physiological water regulation.

Conservation Relevance: Climate Change and Water Stress

As climate change alters rainfall patterns and increases the frequency and severity of drought events across much of sub-Saharan Africa and Southeast Asia, understanding pangolin water requirements is increasingly relevant to conservation planning. Regions that currently support stable pangolin populations may become marginal habitat as dry seasons lengthen and prey moisture content declines.

Habitat management for pangolin conservation may need to incorporate water landscape features -- maintaining seasonal wetlands, preserving riparian zones adjacent to core pangolin habitat -- to ensure that animals have access to high-quality foraging ground during dry periods. For protected area managers working in drier biomes, understanding that pangolins are not entirely independent of surface water may inform decisions about water provision during severe droughts.