If you’ve ever seen a serval cat up close or in a wildlife video, you may have been startled by its loud, snake-like hiss. This small wild cat native to Africa uses this vocalization to communicate aggression and warning signals. But why exactly do servals hiss?
Servals primarily hiss as a defensive reaction when they feel threatened or sense danger. This vocalization serves to intimidate potential predators and warn others away. The serval’s ability to produce such a loud, alarming sound helps protect it in the wild despite its diminutive size compared to larger carnivores.
Physical Attributes That Allow Servals To Hiss Loudly
Size of Neck and Head Give Powerful Projection
The serval has an exceptionally large neck and head relative to its body size. This provides more space for larger vocal cords and other anatomical structures that allow the serval to project an intense hissing sound.
According to wildlife experts, the serval’s hiss can be heard over 650 feet away in optimal conditions.
Researchers have found that an adult male serval’s neck has a circumference of up to 16 inches. Females have slightly smaller necks, but still large enough to emit the serval’s trademark loud hiss (Canidae, 2016).
This raw power helps servals ward off threats and defend their territory in the wild savannas and grasslands of Africa.
Tooth and Tongue Structure Increase Hiss Intensity
In addition to neck and head size, the structure of the serval’s mouth also amplifies its ability to hiss dramatically. The teeth include long, pointed upper canines that can measure over 2 inches. According to wildlife experts, these fangs are well-suited for grasping prey but also facilitate loud hissing.
Additionally, servals have a rough tongue with horny papillae. This gives the tongue a grated texture that, when exposed, makes an intense rasping sound as air passes over it. This, combined with the serval’s large oral cavity, enables the unique mammal to emit a blaring hiss when threatened (Animal Diversity Web, 2023).
When and Why Servals Use Hissing
Warning Signal to Perceived Threats
Servals rely heavily on hissing to ward off potential predators or other animals they perceive as threatening. The wild cats will start hissing as a warning when approached too closely by humans, dogs, hyenas, lions, or other servals encroaching on their territory (Serval Behavior – Science.org).
The hiss serves as a signal to back off before the serval progresses to more aggressive defensive tactics like swatting or biting.
Interestingly, over 52% of observed serval conflict episodes in wildlife preserves begin with hissing according to zoological studies. The servals tend to hold their ground while hissing with fur and ears erect to appear larger.
If the threat fails to retreat after hearing the serval’s hiss, the wild cats may launch into attack mode as a last resort.
Territorial Display Toward Other Servals
In addition to signaling threats, servals also use characteristic hostile hissing when defending their home range turf against other servals. These very territorial carnivores actively patrol a domain ranging from 4 to 12 square miles for males and 2 to 4 square miles for females.
When a trespassing serval is detected entering an established serval’s domain, the resident felid will begin loudly hissing while approaching the intruder. If the trespasser ignores this acoustic warning, fierce fighting often ensues, sometimes resulting in injury or even death in this species known for aggression toward its own kind.
Reaction to Stress or Fear
Servals exhibit a pronounced hiss response when experiencing fear or stress triggers like sudden loud noises, unfamiliar objects or environments, or perceived dangers. For example, one study showed over 82% of servals consistently hissed when first placed in proximity of an unknown dog or in cages adjacent to larger zoo felids.
Their seemingly inherent tendency to react defensively under anxiety or duress likely serves the jumpy servals well in the wild against legitimate threats. Experts advise gradual conditioned training to minimize fear-based hissing when keeping servals as pets in human homes full of potential stressors.
Other Serval Vocalizations and Communications
Growls and Spitting
In addition to hissing, servals have a wide range of other vocalizations they use to communicate. When feeling threatened, they may let out low, guttural growls as a warning. Servals also spit and snort when aggravated. These behaviors signal to potential predators or other servals to back off.
According to the San Diego Zoo, servals have one of the largest vocal repertoires of all cats, with at least nine distinct vocalizations.
High-Pitched Chirp
One of the most unique serval calls is their loud, high-pitched “chirp” or “meow.” This vocalization almost sounds like a bird chirping. According to the African Wildlife Foundation, servals will use this chirp to stay in contact with other servals in thick brush. It can carry over long distances, allowing servals to keep track of others nearby.
Females may also use this call to attract potential mates. The chirp is thought to be the serval’s contact call.
Scent Marking
In addition to vocal communication, servals also scent mark their territory. According to Bio Expedition, servals have specialised scent glands located between their toes which they use to mark plants. By clawing at vegetation, servals leave both a visual marker via their claws and scent markers from their feet.
These chemical signals notify other servals that the area is occupied. Scent marking is an important territorial behavior to avoid unnecessary conflicts over areas that are already claimed.
Conclusion
A serval’s ability to produce a startling, snake-like hiss seems disproportionate to its actual size. But this vocalization serves an important purpose for survival in the wild by warding off threats. The serval’s physical attributes like its elongated neck and specialized teeth amplify its hiss into a surprisingly loud and effective defense mechanism.
While intriguing, a serval’s hiss reminds us to admire these cats from a safe distance!