Spotted hyena – predator with complex social structure

The Spotted Hyena at a Glance

The spotted hyena (Crocuta crocuta) is a nocturnal predator from the hyena family (Hyaenidae) and is widespread in large parts of Africa south of the Sahara. It inhabits savannas, open forests, semi-deserts, and even mountainous regions up to altitudes of about 4,000 meters. Despite its unflattering reputation as a "scavenger," it is a highly specialized hunter that lives in clans and is one of Africa's most successful large predators.

Characteristics and Adaptations

The spotted hyena is the largest and most robust member of the hyena family. Adults reach a shoulder height of up to 85 centimeters and a weight of 55 to 86 kilograms. Its distinctive appearance is characterized by:

• Fur: Short, yellowish-gray with irregular dark spots ("spots"), which vary individually.
• Body structure: Massive skull with powerful jaws that can crush bones with a pressure of up to 3,000 Newtons per square centimeter – stronger than that of a lion.
• Gait: Typical "limping" running style due to the shorter hind legs in relation to the front body.
• Sexual characteristics: Females are larger and more dominant than males; their external genitalia resemble those of males, which led to historical misjudgments about their sex.

Social Structure and Clan Life

Spotted hyenas live in matriarchal clans that can consist of up to 80 individuals. The hierarchy within a clan is determined by a complex mix of aggression, submission, and social bonds. Key features of the social structure:

• Matrilineal hierarchy: The highest rank is inherited by the oldest daughter of the alpha hyena. Females remain in the clan for life, while males often disperse.
• Communication: Vocalizations such as the characteristic "laugh" (a guttural, chuckling sound) serve to establish contact, mark territory, or appease. Each clan develops its own sound patterns.
• Cooperative hunting: Hyenas hunt in groups and use their stamina to chase prey such as zebras, wildebeests, or warthogs. Hunting success depends on the size of the pack.
• Food sharing: Prey is shared within the clan, with high-ranking females having preferred access. Carrion plays a subordinate role – about 70% of food comes from animals they have killed themselves.

Reproduction and Rearing

The reproduction of the spotted hyena is unique and associated with high risks:

• Pregnancy: The gestation period is about 110 days. Birth takes place in a protected den, but the cubs are born with open eyes and well-developed fur.
• Birth complications: The unusually large clitoris of the females makes birth difficult. Up to 10% of first-time mothers die as a result.
• Rearing: The cubs are suckled for about 12–18 months but remain in the clan for up to two years. They learn through observation and play, especially fighting and hunting.
• Sex ratio: At birth, males slightly outnumber females, but in adulthood, females dominate due to higher mortality among males.

Ecological Role and Interactions

Spotted hyenas fulfill several critical functions in the ecosystem:

• Predation: They regulate populations of ungulates and prevent overgrazing. Studies show that their presence improves herd health.
• Clean-up service: By eating carrion, they reduce the spread of diseases such as anthrax or rabies.
• Competition with lions: Hyenas and lions are the two dominant large predators in Africa. Conflicts over prey or territory are common, with hyenas often outnumbering lions. They even drive lions away from their own kills.
• Symbiosis with vultures: Hyenas leave remains that are used by vultures and other scavengers. This relationship is an example of mutualistic interactions.

Threats and Conservation Status

Despite their adaptability, spotted hyenas face several threats:

• Human-wildlife conflict: In some regions, hyenas are perceived as a threat to livestock or even humans. Poisoning, traps, or targeted killings are common.
• Habitat loss: The expansion of agriculture, settlements, and infrastructure reduces their natural habitats.
• Persecution for body parts: In parts of East Africa, hyenas are hunted for traditional medicine or as "good luck charms."

The IUCN classifies the spotted hyena as "near threatened." In protected areas such as Serengeti National Park or Kruger National Park, populations are stable, but outside these areas, pressure is high.

Observing in the Wild

Spotted hyenas are nocturnal animals, which poses challenges for observers. Nevertheless, there are ways to experience them in their natural habitat:

• Best time to visit: The dry season (June–October) offers better visibility as the vegetation is sparser and animals concentrate around waterholes.
• Recommended protected areas:
  • Tanzania: Serengeti National Park, Ngorongoro Crater
  • Kenya: Masai Mara, Amboseli National Park
  • Botswana: Okavango Delta, Chobe National Park
  • South Africa: Kruger National Park, Sabi Sands
• Tips for observation:
  • Use guided night safaris with experienced guides who can interpret the calls and tracks of hyenas.
  • Look for fresh signs such as bone remains or footprints near water sources.
  • Do not feed hyenas or approach them – they are wild animals and can react aggressively.

Facts at a Glance

Further Information

For in-depth insights, we recommend the following resources:

• Books:
  • “Hyena” by Stephen E. Glickman (scientific monograph)
  • “The Serengeti Rules” by Sean B. Carroll (role of predators in the ecosystem)
• Documentaries:
  • “Hyenas: The Dark Side” (BBC Earth)
  • “The Hunt” (BBC, episode on hyenas)
• Organizations:
  • Hyaenidae Specialist Group (IUCN)
  • African Wildlife Foundation